January 1 – Kristiania, the capital of Norway, reverted to its original name of Oslo.
January 3 – Benito Mussolini made a pivotal speech in the Italian Chamber of Deputies. He took personal responsibility for the actions of his Blackshirts, challenged his political opponents to remove him from office and then promised to take charge of restoring order to Italy within forty-eight hours. Historians now trace this speech to the beginning of Mussolini's dictatorship.
January 5 – Nellie Tayloe Ross became the first female governor (Wyoming) in the United States. Twelve days later, Ma Ferguson became first female governor of Texas.
January 25 – Hjalmar Branting resigns as Prime Minister of Sweden because of ill health, and is replaced by the minister of trade, Rickard Sandler .
January 27–February 1 – The 1925 serum run to Nome (the "Great Race of Mercy") relayed diphtheria antitoxin by dog sled across the U.S. territory of Alaska, to combat an epidemic.
February 15 – The Alice Comedy Alice Solves the Puzzle was released by Disney Brothers Cartoon Studio, introducing Bootleg Pete (an early prototype for Pegleg Pete) for the first time.
February 21 – *This is the cover date of the very first issue of The New Yorker, though not necessarily the publication date, as magazines usually date their covers ahead of time.
February 25 – Art Gillham recorded for Columbia Records the first Western Electric masters to be commercially released.
February 28 – The 1925 Charlevoix–Kamouraska earthquake struck northeastern North America.
İsmet İnönü was appointed as the prime minister in Turkey (Turkey's 4th and İnönü's 3rd government).
Calvin Coolidge is sworn in for a full term as President of the United States. It was the first inauguration to be broadcast on radio.
March 6 – Pionerskaya Pravda, one of the oldest children's newspapers in Europe, was founded in the Soviet Union.
March 9–May 1 – Pink's War: The British Royal Air Force bombarded mountain strongholds of Mahsud tribesmen in South Waziristan.
March 10 – Greece’s most successful football club, Olympiacos founded in Athens.
March 15 – The Phi Lambda Chi fraternity (original name "The Aztecs") was founded on the campus of Arkansas State Teacher's College in Conway, Arkansas (now the University of Central Arkansas).
March 18 – The Tri-State Tornado, the deadliest in U.S. history, rampaged through Missouri, Illinois, and Indiana, killing 695 people and injuring 2,027. It hit the towns of Murphysboro, Illinois; Gorham, Illinois; Ellington, Missouri; and Griffin, Indiana.
March 21 – Tennessee Governor Austin Peay signed the Butler Act, prohibiting the teaching of evolution in the state's public schools.
March 31 – Radio station WOWO in Fort Wayne, Indiana began broadcasting.
April–October – The Exposition Internationale des Arts Décoratifs et Industriels Modernes is held in Paris, giving a name to the Art Deco style.
Frank Heath and his horse Gypsy Queen left Washington, D.C. to begin a two-year journey to visit all 48 states.
The Patent and Trademark Office was transferred to the Department of Commerce.
April 10 – F. Scott Fitzgerald published The Great Gatsby.
April 15 – Fritz Haarmann, a serial killer convicted of the murder of 24 boys and young men, was beheaded in Germany.
April 16 – The Communist assault on St. Nedelya Church claims roughly 150 lives in Sofia, Bulgaria.
April 19 – Colo-colo, as well known for football club of Chile, founded in Macul, suburb of Santiago.
April 20 – Iranian forces of Rezā Shāh occupied Ahvaz, and arrested Sheikh Khaz'al.
April 28 – Presenting the Stanley Baldwin government's budget, Chancellor of the Exchequer Winston Churchill announced Britain's return to the gold standard.
May 1 – The mausoleums in al-Baqi were destroyed by King Ibn Saud (Lanati). In the same year, he also demolishes the tombs of holy persons at Mualla Cemetery in Mecca where Muhammad's first wife Khadijah, his grandfather and other ancestors are buried. This happened despite protests by the international Islamic community.
Scopes Trial: Dayton, Tennessee, biology teacher John Scopes was arrested for teaching Charles Darwin's Theory of Evolution.
The General Election Law was passed in Japan.
May 8 – Tom Lee rescued 32 people from the M.E. Norman, a sinking steamboat.
Scopes Trial: John T. Scopes was indicted for teaching Darwin's theory of evolution.
The National Forensic League was founded.
May 29 – British explorer Percy Fawcett sent a last telegram to his wife, before he disappeared in the Amazon.
June 1 – Percy and Florence Arrowsmith were married. This couple, who celebrated their 80th wedding anniversary June 1, 2005 (Percy aged 105, and wife Florence 100), are acknowledged by the Guinness Book of Records as record-holders for the longest marriage for a living couple and the greatest aggregate age of a married couple.
June 6 – The Chrysler Corporation was founded by Walter Percy Chrysler.
June 13 – Charles Francis Jenkins achieved the first synchronized transmission of pictures and sound, using 48 lines, and a mechanical system. A 10-minute film of a miniature windmill in motion was sent across 5 miles from Anacostia to Washington, D.C. The images were viewed by representatives of the National Bureau of Standards, the U.S. Navy, the Commerce Department, and others. Jenkins calls this "the first public demonstration of radiovision".
The Aristotle University of Thessaloniki in Greece was founded.
The Turkish football club Göztepe was founded.
June 29 – The 6.8 Mw Santa Barbara earthquake affects the central coast of California with a maximum Mercalli intensity of IX (Violent), destroying much of downtown Santa Barbara, California and leaving 13 people dead.
July 9 – In Dublin, Ireland, Oonagh Keogh became the first female member of a stock exchange in the world.
Scopes Trial: In Dayton, Tennessee, the so-called "Monkey Trial" began with John T. Scopes, a young high school science teacher, accused of teaching evolution in violation of a Tennessee state law.
Meher Baba begins his 44-year silence.
July 18 – Adolf Hitler published Volume 1 of his personal manifesto Mein Kampf.
July 21 – Scopes Trial: In Dayton, Tennessee, high school biology teacher John T. Scopes was found guilty of teaching evolution in class and fined $100.
July 25 – The Telegraph Agency of the Soviet Union (TASS) was established.
August 8 – The Ku Klux Klan demonstrated its popularity by holding a parade in Washington DC; as many as 40,000 male and female members of the Klan march down Pennsylvania Avenue. In 1925, an estimated 5,000,000 members belong to the Ku Klux Klan, making it the largest fraternal organization in the United States.
August 14 – The original Hetch Hetchy Moccasin Powerhouse was completed and goes on line.
August 25 – The French completed their evacuation of the Ruhr region of Germany.
September 3 – The U.S. Navy dirigible Shenandoah broke up in a squall line near Caldwell, Ohio; 14 crewmen are killed.
September 27 – Feast of the Cross according to the Old Calendar; A celestial cross appeared over Athens, Greece, while the Greek police pursues a group of Greek Old Calendarists. The phenomenon lasted for half an hour.
October – The major money forgery and fraud of Alves dos Reis was exposed in Portugal.
October 1 – Mount Rushmore National Memorial was dedicated in South Dakota.
October 2 – In London
John Logie Baird successfully transmitted the first television pictures with a greyscale image.
The city's first enclosed double-decker buses were introduced.
October 5–16 – The Locarno Treaties were negotiated.
October 8 – Cubana de Aviación was founded.
November 5 – Secret agent Sidney Reilly is executed by the OGPU, the secret police of the Soviet Union.
November 9 – Formal foundation date of the Schutzstaffel (SS) as a personal bodyguard for Adolf Hitler in Germany.
November 14 – The first Surrealist art exhibition opened in Paris.
November 24 – The silent film El Húsar de la Muerte was released in Santiago, Chile.
November 26 – Prajadhipok (Rama VII) was crowned as King of Siam.
November 28 – The weekly country music-variety radio program Grand Ole Opry was first broadcast on WSM radio in Nashville, Tennessee, as the "WSM Barn Dance".
December 1 – The Locarno Treaties were signed in London.
December 11 – Pope Pius XI's encyclical Quas primas, on the Feast of Christ the King, is promulgated.
Reza Shah became shah of Persia.
Alpha Phi Omega, a National service fraternity, was founded at Lafayette College.
Colombo Radio launched in Ceylon; the station was subsequently known as Radio Ceylon.
December 25 – IG Farben was formed by the merger of six chemical companies in Germany.
Spring – Leica I 35 mm film still camera introduced.
The Australian state of Queensland introduced a 44-hour working week.
The Brisbane City Council, (Brisbane, Australia), was created from the amalgamation of 20 smaller cities, towns and shires.
New York City became the largest city in the world, taking the lead from London.
The Thompson submachine gun sold for $175 in the 1925 Sears, Roebuck and Company mail order catalog.
The National Football League added 5 teams: the New York Giants, Detroit Panthers, Providence Steam Roller, a new Canton Bulldogs team, and the Pottsville Maroons.
In Germany, the Bauhaus moved to a building in Dessau designed by Walter Gropius.
Lion Feuchtwanger's novel Jud Süß published.
The Shueisha Publishing Company was founded in Tokyo.
The Wheel gymnastics was invented in Germany.
Paul Bomani, Tanzanian politician and ambassador (d. 2005)
Wahiduddin Khan, noted Islamic scholar and peace activist
Larry Harmon, American entertainer and TV producer (Bozo the Clown) (d. 2008)
Eraño de Guzman Manalo, 2nd Executive Minister (Tagapamahalang Pangkalahatan) of the Iglesia ni Cristo (Church of Christ) (d. 2009)
January 4 – Veikko Hakulinen, Finnish cross-country skier (d. 2003)
January 6 – John DeLorean, American car maker (d. 2005)
January 7 – Gerald Durrell, British naturalist, zookeeper, author, and television presenter (d. 1995)
January 8 – Helmuth Hübener, German youth political activist against the Hitler regime (d. 1942)
January 9 – Lee Van Cleef, American actor (d. 1989)
Georgi Kaloyanchev, Bulgarian actor (d. 2012)
Gwen Verdon, American actress and dancer (d. 2000)
January 14 – Yukio Mishima, Japanese writer (d. 1970)
January 17 – Duane Hanson, American sculptor (d. 1996)
January 21 – Charles Aidman, American actor (d. 1993)
Barbara Carroll, American jazz pianist (d. 2017)
Gilles Deleuze, French philosopher (d. 1995)
Joan Leslie, American actress (d. 2015)
Paul Newman, American actor, film director, entrepreneur and philanthropist (d. 2008)
January 29 – Robert W. McCollum, American epidemiologist, (d. 2010)
Douglas Engelbart, American inventor (d. 2013)
Dorothy Malone, American actress
January 31 – Bernardino Rivera Álvarez, Bolivian bishop (d. 2010)
February 1 – Mary Nesbitt, American female professional baseball player (d. 2013)
February 2 – Elaine Stritch, American actress (d. 2014)
Leon Schlumpf, Swiss Federal Councillor (d. 2012)
John Fiedler, American actor (d. 2005)
February 7 – Hans Schmidt, Canadian professional wrestler (d. 2012)
February 8 – Jack Lemmon, American actor and film director, better known for his role in The Odd Couple (d. 2001)
February 10 – Pierre Mondy, French film and theatre actor and director (d. 2012)
Amparo Rivelles, Spanish actress (d. 2013)
Kim Stanley, American actress (d. 2001)
Virginia E. Johnson, American sexologist (d. 2013)
February 12 – Ted Innes, Australian politician (d. 2010)
Ron Goodwin, English composer and conductor (d. 2003)
Hal Holbrook, American actor (Mark Twain Tonight)
February 18 – George Kennedy, American actor (Cool Hand Luke) (d. 2016)
Robert Altman, American film director (d. 2006)
Pat Lanigan, Australian public servant (d. 1992)
February 21 – Sam Peckinpah, American director (d. 1984)
February 23 – Eric Prabhakar, Indian sprinter (d. 2011)
February 24 – Bud Day, United States Air Force colonel (d. 2013)
Maddy English, American female baseball player (d. 2004)
Aino Seep, Estonian singer and actress (d. 1982)
Shehu Shagari, President of Nigeria from 1979 to 1983
February 26 – Everton Weekes, West Indian cricketer
February 27 – Samuel Dash, American Watergate Congressional counsel (d. 2004)
March 4 – Paul Mauriat, French musician (Love is Blue) (d. 2006)
March 7 – Rene Gagnon, U.S. Marine flag raiser on Iwo Jima (d. 1979)
March 12 – Leo Esaki, Japanese physicist, Nobel Prize laureate
March 14 – John Jacobs, English golfer (d. 2017)
Cornell Borchers, German actress (d. 2014)
Luis E. Miramontes, Mexican chemist (d. 2004)
March 17 – Gabriele Ferzetti, Italian actor (d. 2015)
March 22 – Gerard Hoffnung, German-born English humorist (d. 1959)
David Watkin, British cinematographer (d. 2008)
Robie Lester, American Grammy-nominated voice artist and singer (d. 2005)
March 25 – Flannery O'Connor, American writer (d. 1964)
March 26 – Pierre Boulez, French composer (d. 2016)
March 29 – Bobby Hutchins, Our Gang child star (d. 1945)
April – Qassem Al-Nasser, Jordanian General (d. 2007)
April 2 – Hans Rosenthal, German radio editor, director, one of the most popular German radio and TV hosts of the 1970s and 1980s (d. 1987)
April 3 – Tony Benn, British politician (d. 2014)
April 4 – Fariza Magomadova, Chechen educator and boarding school director
April 7 – Chaturanan Mishra, Indian politician (d. 2011)
Gene Ammons, American jazz saxophonist (d. 1974)
Rod Steiger, American actor, better known for his role in In The Heat Of The Night (d. 2002)
April 18 – Bob Hastings, American actor (d. 2014)
April 19 – Hugh O'Brian, American actor (d. 2016)
Elena Verdugo, American actress
Ernie Stautner, German-born American football player (d. 2006)
April 21 – Solomon Perel, Israeli motivational speaker
April 22 – George Cole, English actor (d. 2015)
Faye Dancer, American baseball player (d. 2002)
Eugen Weber, Romanian-born historian (d. 2007)
April 25 – Kay E. Kuter, American actor (d. 2003)
Michele Ferrero, Italian businessman (d. 2015)
Jørgen Ingmann, Danish musician (d. 2015)
April 27 – Joey LaMotta, brother and one time manager of former world middleweight boxing champion, Jake LaMotta (d. 1991)
April 30 – Johnny Horton, American country music and rockabilly singer (d. 1960)
Scott Carpenter, American astronaut (d. 2013)
Anna May Hutchison, American professional baseball player (d. 1998)
Maria Barroso, Portuguese politician and actress (d. 2015)
Eddie Garcia, Filipino actor and director
Inga Gill, Swedish actress (d. 2000)
John Neville, English actor (d. 2011)
Lou Rowan, Australian Test cricket match umpire
May 3 – Jean Séguy, French sociologist of religions (d. 2007)
Maurice R. Greenberg, American businessman
Olive Osmond, Osmond family matriarch (d. 2004)
Jenő Buzánszky, Hungarian footballer (d. 2015)
May 5 – Charles Chaplin Jr., American actor (d. 1968)
May 7 – Jorge Loredo, Brazilian actor and comedian, interpreter of Zé Bonitinho (d. 2015)
May 8 – Ali Hassan Mwinyi, Tanzanian president
May 12 – Yogi Berra, American baseball player (d. 2015)
Marvin Traub, American businessman and writer (d. 2012)
Sophie Kurys, American professional baseball player (d. 2013)
Patrice Munsel, American opera singer (d. 2016)
May 15 – Andrei Eshpai, Russian pianist (d. 2015)
Pol Pot, Cambodian Khmer Rouge leader (d. 1998)
Brian Moll, Australian character actor, director and producer (d. 2010)
Malcolm X, African-American civil rights activist (d. 1965)
James King, American tenor (d. 2005)
Jean Tinguely, Swiss painter and sculptor (d. 1991)
May 23 – Joshua Lederberg, American molecular biologist, recipient of the Nobel Prize in Physiology or Medicine (d. 2008)
May 24 – Mai Zetterling, Swedish actress and film director (d. 1994)
Jeanne Crain, American actress (d. 2003)
José María Gatica, Argentine boxer (d. 1963)
Alec McCowen, English actor (d. 2017)
Carmen Montejo, Cuban-born Mexican actress (d. 2013)
Dietrich Fischer-Dieskau, German lyric baritone and conductor (d. 2012)
Pavel Štěpán, Czech pianist (d. 1998)
May 31 – Frei Otto, German architect (d. 2015)
June 1 – Dilia Díaz Cisneros, Venezuelan teacher
Julius Blank, semiconductor pioneer (d. 2011)
Buddy Elias, Swiss actor and president of the Anne Frank Fonds (d. 2015)
June 3 – Tony Curtis, American actor (d. 2010)
June 5 – Warren Frost, American actor (d. 2017)
June 6 – Hideji Ōtaki, Japanese actor (d. 2012)
John Biddle, American yachting cinematographer and lecturer (d. 2008)
Robert Smithdas, American deaf-blind teacher, advocate and author (d. 2014)
Barbara Bush, First Lady of the United States
Claude Estier, French politician and journalist (d. 2016)
June 9 – Don Ritchie, Australian official (d. 2012)
June 10 – Nat Hentoff, American historian, novelist, jazz and country music critic, and syndicated columnist for United Media (d. 2017)
June 11 – William Styron, American writer (d. 2006)
June 13 – Dušan Trbojević, Serbian pianist, composer, musical writer and university professor (d. 2011)
Hideyuki Fujisawa, Japanese professional Go player (d. 2009)
Pierre Salinger, White House Press Secretary (d. 2004)
June 15 – Attilâ İlhan, Turkish poet, novelist, essayist, journalist and reviewer (d. 2005)
June 16 – Lewis Morley, American Photographer (d. 2013)
Mervyn Finlay, Australian former member of the Supreme Court of New South Wales and Queen's Counsel (d. 2014)
Luce d'Eramo, Italian writer and literary critic (d. 2001
June 20 – Audie Murphy, American World War II hero and actor (d. 1971)
Larisa Avdeyeva, Russian mezzo-soprano (d. 2013)
Maureen Stapleton, American actress (d. 2006)
Ben Jarvis, American politician
Frank Hindle, English footballer player
Anna Chennault, Chinese widow of World War II leader Lieutenant General Claire Lee Chennault
Oliver Smithies, British-American geneticist (d. 2017)
Clay Evans, African American Baptist pastor
Art Modell, American businessman (d. 2012)
Sergio Realini, Italian professional football player
Ogden R. Reid, United States Representative from New York
P. Viswambharan, Indian politician, socialist, trade unionist and journalist (d. 2016)
Robert Venturi, American architect
June Lockhart, American actress
Jean Frydman, French resistant and businessman
Richard X. Slattery, American actor (d. 1997)
João Restiffe, Brazilian actor
Wayne Terwilliger, American second baseman, coach, and manager in Major League Baseball
June 28 – Ray Boyle, American actor
John Fujioka, American actor of Japanese descent
Giorgio Napolitano, Italian politician and 11th President of Italy
Cara Williams, American actress
Robert Hébras, Oradour-sur Glane massacre survivor
Nancy Saunders, American actress
Mervyn Alexander, English Bishop (d. 2010)
Arthur Storch, American actor and Broadway director (d. 2013)
Ebrahim Amini, Iranian politician
Ros Mey, Cambodian-born American Buddhist monk and survivor of the Khmer Rouge regime (d. 2010)
Mohamed Bensaid Aït Idder, Moroccan politician
Farley Granger, American actor (d. 2011)
Ahmed Mestiri, Tunisian lawyer and politician
Maurice Brun, French politician
Marvin Rainwater, American country and rockabilly singer and songwriter (d. 2013)
Medgar Evers, African-American civil rights activist (d. 1963)
Patrice Lumumba, Congolese independence leader (d. 1961)
Terry Moriarty, Australian rules footballer (d. 2011)
Danny Nardico, American professional boxer (d. 2010)
Dorothy Head Knode, American tennis player
Ciril Zlobec, Slovene poet, writer, translator, journalist and former politician
Jean Larguier, Professor Emeritus of French Law
Fernando de Szyszlo, Peruvian painter, sculptor, printmaker, and teacher
Jean Raspail, French author, traveler and explorer
Ruth Cracknell, Australian actress and author (d. 2002)
Merv Griffin, American game show developer and host (d. 2007)
Bill Haley, American musician (Bill Haley & His Comets) (d. 1981)
Erich Hartstein, German journalist and contributing editor
Marc Breslow, American television director (d. 2015)
Fernand Decanali, French cyclist (d. 2017)
Nicholas Brathwaite, Prime minister of Grenada (d. 2016)
Dominique Nohain, Actor, dramaturge, screenwriter and French director
Åke Forsberg, Finnish football player
Arthur Imperatore Sr., Italian-American businessman from New Jersey
Bill Mackrides, American football quarterback
Dominique Nohain, French actor, dramatist, screenwriter and theatre director
Mary de Rachewiltz, American poet and translator
Tom Luken, American politician
Ronald I. Spiers, United States Ambassador
Borislav Stanković, Serbian former basketball player and coach
Mahathir bin Mohamad, fourth Prime Minister of Malaysia
Susan Cummings, German-American actress
Jerome Kohlberg Jr., American businessman (d. 2015)
Mildred Kornman, American child actress
Murray Waxman, Canadian basketball player
Elwy Yost, Canadian television host (d. 2011)
Nicolai Gedda, Swedish operatic tenor (d. 2017)
David Graham, British actor and voice artist
Fernando Matthei, Chilean Air Force General
Yrjö Järvinen (näyttelijä), Finnish actor
Roger Bonham Smith, former chairman and CEO of General Motors (d. 2007)
Don Campbell, Canadian ice hockey (d. 2012)
Rosie Harris, English author
July 13 – Suzanne Zimmerman, American competition swimmer and Olympic medalist
Elmo Bovio, Argentine professional football player
Francisco Álvarez Martínez, archbishop of the Spanish see of Toledo and a Cardinal in the Roman Catholic Church
Hugh Gillin, American actor (d. 2004)
D. A. Pennebaker, American documentary filmmaker
Gaston Rousseau, French racing cyclist
Badal Sarkar, Indian dramatist and theatre director (d. 2011)
July 16 – Rosita Quintana, Argentine actress
July 17 – Anita Lasker-Wallfisch, German cellist, and a surviving member of the Women's Orchestra in Auschwitz
Windy McCall, relief pitcher in Major League Baseball
Raymond Jones, Australian architect
Hubert Doggart, English sports administrator, cricketer and schoolmaster
Friedrich Zimmermann, German politician (d. 2012)
Allan Elsom, New Zealand rugby union player (d. 2010)
Sue Thompson, American pop and country music singer
Jack Petchey, British businessman
Henri Beaujean, French politician
Jean-Pierre Faye, French philosopher and writer of fiction and prose poetry
Michael Pfeiffer, German former professional football player
John Dossetor, Canadian physician and bioethicist
Hans Aarsleff, emeritus professor of English at Princeton University,
Frantz Fanon, French-Algerian psychiatrist and philosopher (d. 1961)
Jacques Delors, French politician
Stanley Hovdebo, New Democratic Party member of the Canadian House of Commons
Eric Watson, New Zealand former cricketer
July 21 – Johnny Peirson, Canadian Hockey player
July 22 – Joseph Sargent, American film director (d. 2014)
July 23 – Gloria DeHaven, American actress (d. 2016)
July 25 – Benny Benjamin, American musician, known as the main drummer used by Motown for studio recordings (d. 1969)
July 26 – Ana María Matute, Spanish writer (d. 2014)
July 28 – Baruch S. Blumberg, American scientist, recipient of the Nobel Prize in Physiology or Medicine (d. 2011)
Shivram Dattatreya Phadnis, Indian cartoonist
Mikis Theodorakis, Greek composer
Stan Stennett, Welsh comedian, actor and jazz musician (d. 2013)
Alexander Trocchi, Scottish writer (d. 1984)
July 31 – Carmel Quinn, Irish-American singer and performer
Pam Gems, English playwright (d. 2011)
José María Gallardo, Argentine zoologist (d. 1994)
Jimmy Caci, Los Angeles crime family member and a Caporegime (Captain) in the family (d. 2011)
Roy Mackal, American biologist (d. 2013)
Jorge Rafael Videla, 42nd President of Argentina (d. 2013)
Alan Whicker, British television presenter (d. 2013)
Dom Um Romão, Brazilian jazz drummer (d. 2005)
Guy Degrenne, French businessman (d. 2006)
August 4 – Betty Trezza, Italian-American female professional baseball player (d. 2007)
Eddie Baily, England international footballer (d. 2010)
Barbara Bates, American actress and singer (d. 1969)
Olavi Rokka, American gardener and horticulturist (d. 2011)
August 7 – M. S. Swaminathan, Indian scientist
Alija Izetbegović, President of Bosnia-Herzegovina (d. 2003)
Aziz Sattar, Malaysian actor, comedian, singer and director (d. 2014)
Frank Lauterbur, American football player and coach (d. 2013)
Ginny Tyler, American voice actress (d. 2012)
David A. Huffman, American computer scientist (d. 1999)
Valentín Pimstein, Chilean-Mexican producer of telenovelas
Olavi Rokka, Finnish modern pentathlete (d. 2011)
August 10 – Stanislav Brebera, Czech chemist (d. 2012)
August 11 – Arlene Dahl, American actress
Thor Vilhjálmsson, Icelandic writer (d. 2011)
Guillermo Cano Isaza, Colombian journalist (d. 1986)
Norris McWhirter (d. 2004) and his twin brother,
Ross McWhirter (d. 1975), Scottish co-founders of the Guinness Book of Records
Lois Jurgens, American convicted murderer (d. 2013)
Leopold Barschandt, Austrian footballer (d. 2000)
George Wetherill, Director Emeritus, Department of Terrestrial Magnetism
Dale Bumpers, American politician (d. 2016)
José Alfredo Martínez de Hoz, Argentine executive and policy maker (d. 2013)
Peter Beaven, New Zealand architect based in Christchurch (d. 2012)
Benny Bailey, American bebop and hard-bop jazz trumpeter (d. 2005)
Mike Connors, American actor (d. 2017)
Ruth Lessing, American female professional baseball player (d. 2000)
Oscar Peterson, Canadian jazz pianist (d. 2007)
Bill Pinkney, American performer and singer (d. 2007)
Aldo Ciccolini, Italian-born French pianist (d. 2015)
Idriss ibn al-Hassan al-Alami, Moroccan poet and translator (d. 2007)
Mal Waldron, American jazz pianist, composer, and arranger (d. 2002)
Kirke Mechem, American composer
August 19 – Madhav Dalvi, Indian cricketer (d. 2012)
August 20 – Henning Larsen, Danish architect (d. 2013)
August 21 – Toma Caragiu, Romanian theatre, television and film actor (d. 1977)
Honor Blackman, English actress
Terry Donahue, Canadian female professional baseball player
August 25 – Thea Astley, Australian writer (d. 2004)
August 26 – Jack Hirshleifer, American economist (d. 2005)
August 27 – Nat Lofthouse, English footballer (d. 2011)
Donald O'Connor, American actor, singer, and dancer (d. 2003)
José Parra Martínez, Spanish footballer (d. 2016)
August 29 – Demetrio Basilio Lakas Bahas, former President of Panama (d. 1999)
August 30 – Laurent de Brunhoff, French writer and illustrator
Maurice Pialat, French actor and director (d. 2003)
Pete Vonachen, American restaurateur and baseball team owner (d. 2013)
September 3 – Shoista Mullojonova, Tajik-born Shashmakom singer (d. 2010)
September 7 – Laura Ashley, Welsh designer (d. 1985)
September 8 – Peter Sellers, English comedian and actor, better known for his role in The Pink Panther (d. 1980)
September 10 – Boris Alexandrovich Tchaikovsky, Russian composer (d. 1996)
Mel Tormé, American musician (d. 1999)
Marshall Flaum, American television director, producer and screenwriter (d. 2010)
September 15 – Helle Virkner, Danish actress (d. 2009)
Charles Haughey, sixth Taoiseach (head of government of the Republic of Ireland) (d. 2006)
B.B. King, American singer-songwriter and guitarist (d. 2015)
September 19 – Franklin Sousley, U.S. Marine flag raiser on Iwo Jima (d. 1945)
September 20 – Ananda Mahidol, King Rama VIII of Siam (d. 1946)
September 23 – Denis Twitchett, Cambridge scholar and Chinese historian (d. 2006)
September 24 – Autar Singh Paintal, Indian medical scientist (d. 2004)
Paul B. MacCready, Jr., American aeronautical engineer (d. 2007)
Silvana Pampanini, Italian actress (d. 2016)
September 26 – Marty Robbins, American singer, songwriter, racing driver (d. 1982)
September 27 – Robert G. Edwards, British Nobel physiologist (d. 2013)
Cromwell Everson, South African composer (d. 1991)
Carolyn Morris, American female professional baseball player (d. 1996)
September 29 – John Tower, American politician (d. 1991)
September 30 – Arkady Ostashev, Soviet engineer and rocket scientist (d. 1998)
Christine Pullein-Thompson, British author (d. 2005)
Diana Pullein-Thompson, British author (d. 2015)
October 3 – Gore Vidal, American author (d. 2012)
October 4 – Fyodor Terentyev, Soviet Olympic cross-country skiier (d. 1963)
October 5 – Gail Davis, American actress (d. 1997)
October 7 – Mildred Earp, American female professional baseball player
October 11 – Elmore Leonard, American novelist (d. 2013)
Lenny Bruce, American comic (d. 1966)
Margaret Thatcher, Prime Minister of the United Kingdom from 1979 to 1990 (d. 2013)
October 14 – Phillip V. Tobias, South African palaeoanthropologist (d. 2012)
October 15 – Bob Rowland Smith, Australian politician (d. 2012)
October 16 – Angela Lansbury, English-born U.S. actress
October 19 – Emilio Eduardo Massera, Argentine Naval military officer (d. 2010)
Art Buchwald, American humorist and columnist (d. 2007)
Gene Wood, American game show announcer (d. 2004)
Celia Cruz, Cuban-American singer (d. 2003)
Surjit Singh Barnala, Indian politician (d. 2017)
October 22 – Robert Rauschenberg, American painter and graphic artist (d. 2008)
October 23 – Johnny Carson, American comedian and television host (The Tonight Show) (d. 2005)
Bob Azzam, Egyptian singer (d. 2004)
Luciano Berio, Italian composer (d. 2003)
Al Feldstein, American artist and comic book creator (d. 2014)
October 27 – Warren Christopher, American diplomat (d. 2011)
Dominick Dunne, American writer (d. 2009)
Robert Hardy, English actor
Klaus Roth, British mathematician (d. 2015)
October 31 – John Pople, English chemist, Nobel Prize laureate (d. 2004)
November 4 – Doris Roberts, American actress (d. 2016)
November 9 – Giovanni Coppa, Italian cardinal (d. 2016)
November 10 – Richard Burton, Welsh actor, better known for his role in Cleopatra (d. 1984)
Jonathan Winters, American actor and comedian (d. 2013)
John Guillermin, British director (d. 2015)
November 12 – Heinz Schubert, German actor (d. 1999)
November 17 – Rock Hudson, American actor (d. 1985)
November 18 – Gene Mauch, baseball manager (d. 2005)
November 19 – Zygmunt Bauman, Polish military officer, sociologist and philosopher (d. 2017)
Kaye Ballard, American comedian (The Mothers-in-Law)
Robert F. Kennedy, American politician and Attorney General of the United States (d. 1968)
Mark Miller, American actor
Maya Plisetskaya, Russian ballerina (d. 2015)
November 22 – Gunther Schuller, American musician (d. 2015)
November 23 – Maria di Gerlando, American operatic soprano (d. 2010)
William F. Buckley, Jr., American journalist, author, and commentator (The Firing Line) (d. 2008)
Simon van der Meer, Dutch physicist, Nobel Prize laureate (d. 2011)
Gregorio Conrado Álvarez, Uruguayan general and former dictator (d. 2016)
Eugene Istomin, American pianist (d. 2003)
John Maddox, Welsh science writer (d. 2009)
Ernie Wise, English comedian (d. 1999)
November 30 – William H. Gates, Sr., American attorney, father of Bill Gates
December 1 – Martin Rodbell, American scientist, recipient of the Nobel Prize in Physiology or Medicine (d. 1998)
December 2 – Julie Harris, American actress (d. 2013)
December 3 – Erik Mørk, Danish actor (d. 1993)
December 4 – Lino Lacedelli, Italian mountaineer (d. 2009)
Sammy Davis Jr., American singer, dancer, musician, and actor (d. 1990)
Hank Thompson, American player in the Negro leagues and Major League Baseball (d. 1969)
December 11 – Paul Greengard, American neuroscientist, recipient of the Nobel Prize in Physiology or Medicine
December 12 – Vladimir Shainsky, Soviet and Russian composer
December 13 – Dick Van Dyke, American actor, singer, dancer and comedian (The Dick Van Dyke Show)
Hiroshi Motoyama, Japanese scientist (d. 2015)
Kasey Rogers, American actress (d. 2006)
Rabah Bitat, former President of Algeria (d. 2000)
Robert B. Sherman, American songwriter (d. 2012)
December 21 – Dorothy Kamenshek, American professional baseball player (d. 2010)
December 23 – Duncan Hallas, prominent member of the Trotskyist movement in Great Britain (d. 2002)
December 25 – Dorothy Mueller, American professional baseball player (d. 1985)
Hildegard Knef, German actress, singer and writer (d. 2002)
Milton Obote, President of Uganda (d. 2005)
Pete Dye, American golf course architect
Luis Alberto Monge, Costa Rican politician (d. 2016)
December 30 – Shirley Herz, American Broadway theatre (d. 2013)
Godrej Sidhwa, Pakistani theologist (d. 2011)
January 4 – Nellie Cashman, Irish-born prospector (b. 1845)
January 8 – George Bellows, American artist (b. 1882)
Camille Decoppet, Swiss Federal Councilor (b. 1852)
Harry Furniss, English cartoonist, illustrator and pioneer animator (b. 1854)
January 16 – Aleksey Kuropatkin, Russian general and Imperial Russian Minister of War (b. 1848)
January 18 – Charles Lanrezac, French general (b. 1852)
January 22 – Fanny Bullock Workman, American geographer, writer and mountain climber (b. 1859)
Alexander Kaulbars, Russian general and explorer (b. 1844)
Caspar F. Goodrich, American admiral (b. 1847)
Sir James Mackenzie, Scottish cardiologist (b. 1853)
January 31 – George Washington Cable, American writer (b. 1844)
February 2 – Jaap Eden, Dutch speed skater (b. 1873)
February 3 – Oliver Heaviside, English mathematician (b. 1850)
February 4 – Robert Koldewey, German architect and archaeologist (b. 1855)
February 10 – Aristide Bruant, French singer and nightclub owner (b. 1851)
February 11 – H. E. Beunke, Dutch writer (b. 1851)
February 18 – James Lane Allen, American writer (b. 1849)
February 24 – Hjalmar Branting, 19th Prime Minister of Sweden, recipient of the Nobel Peace Prize (b. 1860)
February 25 – Louis Feuillade, French silent film director (b. 1873)
February 28 – Friedrich Ebert, 1st President of Germany (Weimar Republic) (b. 1871)
March 2 – Luigj Gurakuqi, Albanian writer and politician (assassinated) (b. 1879)
Moritz Moszkowski, Polish composer (b. 1854)
James Ward, English philosopher and psychologist (b. 1843)
John Montgomery Ward, American baseball player and MLB Hall of Famer (b. 1860)
March 7 – Georgy Evgenyevich Lvov, Prime Minister of Russia (b. 1861)
March 8 – Juliette Wytsman, Belgian painter (b. 1866)
March 10 – Myer Prinstein, American track athlete (b. 1878)
Gergely Luthár, Hungarian Slovene writer (b. 1841)
Sun Yat-sen, Chinese revolutionary (b. 1866)
March 13 – Lucille Ricksen, American silent film actress (b. 1910)
March 14 – Walter Camp, American football coach (b. 1859)
March 20 – George Curzon, 1st Marquess Curzon of Kedleston, Viceroy of India (b. 1859)
March 28 – Henry Rawlinson, 1st Baron Rawlinson, British general (b. 1864)
March 30 – Rudolf Steiner, Austrian philosopher (b. 1861)
April 6 – Alexandra Kitchin, British model for Lewis Carroll (b. 1864)
April 7 – Patriarch Tikhon of Moscow, Patriarch of the Russian Orthodox Church (b. 1865)
April 13 – Elwood Haynes, American inventor (b. 1857)
April 14 – John Singer Sargent, American artist (b. 1856)
Fritz Haarmann, German serial killer (executed) (b. 1879)
August Endell, German architect (b. 1871)
April 19 – John Walter Smith, American politician (b. 1845)
April 22 – André Caplet, French composer and conductor (b. 1878)
Johann Palisa, Austrian astronomer (b. 1848)
Antun Branko Šimić, Croatian poet (b. 1898)
May 3 – Clement Ader, French Army Captain and aviation pioneer (b. 1841)
William Hesketh Lever, English industrialist, Philanthropist and politician (b. 1851)
Doveton Sturdee, British admiral (b. 1859)
May 10 – William Massey, 19th Prime Minister of New Zealand (b.1856)
Amy Lowell, American poet (b. 1874)
Charles Mangin, French general (b. 1866)
May 14 – H. Rider Haggard, English writer (b. 1856)
May 15 – Nelson A. Miles, American general (b. 1839)
Elias M. Ammons, Governor of Colorado (b. 1860)
Joseph Howard, 1st Prime Minister of Malta (b. 1862)
May 21 – Hidesaburō Ueno, Japanese agricultural scientist and guardian of Hachikō (b. 1871)
May 22 – John French, 1st Earl of Ypres, British World War I field marshal (b. 1852)
May 31 – John Palm, Curaçao born composer (b. 1885)
Lucien Guitry, French actor (b. 1860)
Thomas R. Marshall, 28th Vice President of the United States (b. 1854)
June 2 – James Ellsworth, American mine owner and banker (b. 1849)
June 3 – Camille Flammarion, French astronomer (b. 1842)
June 16 – Emmett Hardy, American jazz cornetist (b. 1903)
June 17 – Adolf Pilar von Pilchau, Baltic German politician, regent of the United Baltic Duchy and baron (b. 1851)
June 18 – Robert M. La Follette Sr., American politician (b. 1855)
June 20 – Josef Breuer, Austrian neurologist (b. 1842)
June 22 – Felix Klein, German mathematician (b. 1849)
June 29 – Christian Michelsen, first Prime Minister of Norway (b. 1857)
July 1 – Erik Satie, French composer (b. 1866)
July 2 – Nikolai Golitsyn last Prime Minister of the Russian Empire (executed) (b. 1850)
July 7 – Clarence Hudson White American photographer (b. 1871)
July 14 – Pancho Villa, Filipino world boxing champion (b. 1901)
July 17 – Lovis Corinth, German painter (b. 1858)
July 19 – John Indermaur, British lawyer (b. 1851)
Antonio Ascari, Italian race car driver (b. 1888)
William Jennings Bryan, American lawyer and politician (b. 1860) (diabetes and fatigue)
Gottlob Frege, German mathematician and philosopher (b. 1848)
July 30 – William Wynn Westcott, British Freemason (b. 1848)
August 6 – Gregorio Ricci-Curbastro, Italian mathematician (b. 1853)
August 12 – Severo Fernández, 29th President of Bolivia (b. 1849)
August 15 – Konrad Mägi, Estonian landscape painter (b. 1878)
August 17 – Ioan Slavici, Romanian writer (b. 1848)
August 25 – Franz Conrad von Hötzendorf, Austrian field marshal (b. 1852)
September 7 – René Viviani, 81st Prime Minister of France (b. 1863)
September 16 – Alexander Alexandrovich Friedman, Russian mathematician (b. 1888)
September 17 – Carl Eytel, German-American artist working in Palm Springs, California (b. 1862)
September 29 – Léon Bourgeois, French statesman, recipient of the Nobel Peace Prize (b. 1851)
October 7 – Christy Mathewson, American baseball player and MLB Hall of Famer (b. 1880)
October 14 – Eugen Sandow, German-born bodybuilder, physical culturist (b. 1867)
Mikhail Frunze, Russian Bolshevik leader (b. 1885)
Max Linder, French silent film actor (b. 1883) (suicide)
November 1 – Lester Cuneo, American actor (b. 1888)
November 3 – Lucile McVey, American actress, part of comedy team with her late husband Sidney Drew (b. 1890)
November 6 – Khải Định, Emperor of Vietnam (b. 1885)
Queen Alexandra, consort of Edward VII of the United Kingdom (b. 1844)
Clara Morris, Victorian stage actress (b. 1846)
November 21 – Robert Wrenn, American tennis player (b. 1873)
November 25 – King Vajiravudh of Siam (b. 1880)
December 5 – Władysław Reymont, Polish writer, Nobel Prize laureate (b. 1867)
December 8 – Marguerite Marsh, American actress (b. 1888)
December 9 – Pablo Iglesias, co-founder of the Spanish Socialist Workers Party (b. 1850)
December 13 – Antonio Maura, Spanish conservative politician, 5-Time Prime Minister of Spain (b. 1853)
December 15 – Battling Siki, Senegalese boxer (b. 1897)
December 19 – José Ignacio Quintón, Puerto Rican composer and pianist (b. 1881)
Lottie Lyell, Australian female pioneer film director and producer (b. 1890)
Jules Méline, 65th Prime Minister of France (b. 1838)
Alice, Princess Dowager of Monaco, consort of Albert I of Monaco (b. 1858)
Mary Thurman, American actress (b. 1895)
December 25 – Karl Abraham, German psychoanalyst (b. 1877)
Raymond P. Rodgers, American admiral (b. 1849)
Sergei Aleksandrovich Yesenin, Russian lyrical poet (b. 1895)
December 29 – Félix Vallotton, Swiss painter (b. 1865)
December 31 – J. Gordon Edwards, Canadian film director (b. 1867)
Physics – James Franck and Gustav Ludwig Hertz
Chemistry – Richard Adolf Zsigmondy
Physiology or Medicine – not awarded
Literature – George Bernard Shaw
Peace – Austen Chamberlain and Charles Gates Dawes
1925 (MCMXXV) was a common year starting on Thursday (dominical letter D) of the Gregorian calendar, the 1925th year of the Common Era (CE) and Anno Domini (AD) designations, the 925th year of the 2nd millennium, the 25th year of the 20th century, and the 6th year of the 1920s decade.