Arnold is a German and English surname. Notable people with the surname include:
Alice Arnold (born 1962), British broadcaster and journalist
Ann Arnold (1936–2015), English artist
Brad Arnold (born 1978), 3 Doors Down singer
Benedict Arnold (disambiguation), several people
Cecile Arnold (1891 or 1895–1931), American silent film actress
Clinton E. Arnold (born 1958), American New Testament scholar and former president of the Evangelical Theological Society
Cornelius Arnold (1711–after 1757), American poetical writer
David Arnold (disambiguation), several people
Delia Arnold (born 1986), Malaysian squash player
Dominique Arnold (born 1973), American hurdling athlete
Dorothy Arnold (1917–1984), American film actress
Douglas N. Arnold, American mathematician
Đuro Arnold (1853–1941), Croatian writer and philosopher
Eberhard Arnold (1883–1935), German writer, philosopher, and theologian
Eddy Arnold (1918–2008), American country music singer
Eduardo Arnold (born 1947), Argentine politician
Edward Arnold (disambiguation), several people
Sir Edwin Arnold (1832–1904), English poet and journalist
Edwin Lester Arnold (1857–1935), English author
Florence Arnold, English singer, songwriter and drummer best known as Florrie
Frank Arnold (disambiguation), several people
Franz Arnold (1878-1960), Germany comedy writer
Friedrich Arnold (1803–1890), German anatomist
Geoff Arnold (born 1944), English cricketer
Georg Arnold-Graboné (1896–1982), German painter and art teacher
Godfrey Edward Arnold (1914–1989), Austrian American professor of medicine
Graham Arnold (born 1963), Australian association football player and manager
Helen Arnold, silent film actress
Henry H. Arnold (1886–1950), American aviation pioneer and commanding general
Horace Lucian Arnold (died 1915), early American writer on management
Ian Arnold (born 1972), English former association football player
Isaac N. Arnold (1815–1884), congressman during American Civil War; biographer of Abraham Lincoln
James Arnold (disambiguation), several people
Jamie Arnold (disambiguation), several people
Jay Arnold (American football) (born 1912), American football player for Philadelphia Eagles and Pittsburgh Steelers
Jay Arnold (filmmaker), American film director, producer, screenwriter
Jennette Arnold, Montserrat-born British politician and member of the Greater London Assembly
Jim Arnold (disambiguation), several people
Joanne Arnold (born 1931), American actress and model
Joe Arnold (born 1947), American baseball coach
John Arnold (disambiguation), several people
Jonathan Arnold (1741–1793), American physician and statesman
Lenna Arnold (1920–2010), All-American Girls Professional Baseball League player
Lucas Arnold Ker (born 1974), Argentine professional tennis player
Luke Arnold (born 1984), Australian actor
Malcolm Arnold (1921–2006), English composer and symphonist
Marc Arnold (born 1970), South African former association football player
Martin Arnold (born 1959), Austrian film director
Martin Arnold (journalist) (1929–2013), American journalist
Matthew Arnold (1822–1888), English poet and cultural critic
Monica (entertainer) (Monica Denise Arnold) (born 1980), American singer
Nathan Arnold (born 1987), English footballer
Nicholas Arnold (disambiguation), several people
Nick Arnold (writer), British writer
Nick Arnold (footballer) (born 1993), English footballer
Norbert P. Arnold (1920-2014), American politician and invenot
P. P. Arnold, American soul singer
Patricio Arnold (born 1971), Argentine former professional tennis player
Richard Arnold (disambiguation), several people
Robert Arnold (disambiguation), several people
Russ Arnold, American bridge player
Russel Arnold (born 1973), Sri Lankan cricketer
Samuel Arnold (disambiguation), several people
Tom Arnold (disambiguation), several people
Thomas Arnold (disambiguation), several people
Victor Arnold (disambiguation), several people
Vladimir Arnold (1937–2010), Russian mathematician
Werner Arnold (born 1931), German weightlifter
William Arnold (disambiguation), several people
