Horn is a surname. Notable people with the surname include:
Alan F. Horn
Alfred Aloysius "Trader" Horn, an African trader during the Scramble for Africa
Alfred Horn (1918–2001), American mathematician
Horn clause is a term in formal logic named after him
Andrew Horn (died 1328) fishmonger, of Bridge Street, London, Chamberlain of the City (1320-8), author of Liber Horn
Andrew Horn (filmmaker) (b. 1952) director of The Nomi Song
Anton Ludwig Ernst Horn (1774-1848), German physician
Ashley Horn, singer and media personality
Blair Horn, Canadian rower
Bob Horn (broadcaster)
Bruce Horn (born 1960), programmer
Carl von Horn (1903–1989), Swedish general
Carl Graf von Horn (1847–1923), Bavarian general and War Minister
Charles Edward Horn (1786-1849), English composer
Cody Horn (born 1988), American actress and model
Corran Horn, character in Star Wars franchise
Dave van Horn (born 1960), American baseball coach
Dimitris Horn (1921-1998), famous Greek actor
Don Horn (born 1945), American football quarterback
Frederick W. Horn, American lawyer and politician
Frederik Winkel Horn (1845–1898), Danish writer and translator
Frederik Winkel-Horn (1756–1837), Danish writer
Gabriel Horn (1927-2012), Briths biologist
George Henry Horn (1840–1897), U.S. entomologist
Greg Horn, American comic book artist
Guildo Horn (born 1963), German singer
Gustav Horn, Count of Björneborg
Gyula Horn, Prime Minister of Hungary from 1994–1998
Hans Horn (1873-1968), Norwegian engineer and industrialist
Horn of Kankas, a family in Finland and Sweden
Count Arvid Horn (1664–1742), Swedish statesman
Count Gustaf Horn (1592–1657), commander of the Swedish forces in the Thirty Years' War
Evert Horn (1585-1615), Swedish soldier
Brita Horn (1745-1791), Swedish courtier and letter writer
Jeremy Horn (born 1975), American mixed martial artist
Jim Horn (born 1940), American musician
Joan Kelly Horn (born 1936), Missourian politician
Joe Horn (born 1972)
Joseph M. Horn, American psychologist
Julian Horn-Smith, British businessman
Kaniehtiio Horn (born 1986), actress
Karl Friedrich Horn (1762-1830), English composer
Keith Van Horn (born 1975), American basketball player
Laurence R. Horn
Lawrence Horn, record producer
Marie-Louise Horn (1912–1991), German tennis player
Michael "J" Horn (born 1979), American musician and musical director
Michelle Horn (born 1987), American actress
Michiel Horn (born 1939), Canadian historian
Mike Horn (born 1966), Swiss explorer and adventurer
Milton Horn (1906-1995), Russian-American sculptor
Noel Van Horn (born 1968), American born Canadian comic book artist
Paul Horn (1930–2014), flautist
Dr. Paul Horn, computer scientist
Philip de Montmorency, Count of Horn (1518-1568), nobleman in the Low Countries during the Eighty Years War
Rebecca Horn (born 1944), German installation artist
Roni Horn (born 1955), American visual artist and writer
Roy Horn (born 1944), German-American entertainer
Rudolf Horn (born 1954), Austrian biathlete and cross-country skier
Sally P. Horn (born 1958), geographer
Sam Horn (born 1963), baseball player
Shifra Horn (born 1951), Israeli author
Shirley Horn (1934-2005), American jazz singer and musician
Siegbert Horn (1950-2016), East German slalom canoeist
Siegfried Horn (1908-1993), archaeologist and Bible scholar
Steve Horn (1931-2011), university president and U.S. Congressman
Steve Took's Horns, an English rock band of the late 1970s, led by Steve Peregrin Took
Taylor Horn (born 1992), American singer
Ted Horn (1919-1948), American race car driver
Tom Horn (1860-1903), American scout
Tor Egil Horn (born 1976), Norwegian footballer
Trevor Horn (born 1949), British musician
Wade Horn (born 1976), American psychologist
Walter Horn (1908–95), German-born US academic
Walther Hermann Richard Horn (1871-1939), German entomologist
Welby Van Horn (1920-2014), American tennis player
Werner D. Horn, American politician.
William Van Horn (born 1939), American comic book artist
