Nunn is a surname. Notable people with the surname include:
- Alf Nunn (1899–1946), English footballer
- Anthony Nunn (born 1927), British field hockey player
- Beau Nunn (born 1995), American football player
- Bill Nunn (1953–2016), American actor
- Bill Nunn (American football) (1924-2014), American journalist and American football scout
- Bobby Nunn (disambiguation), multiple people
- David Nunn (1962–2012), British actor
- David Alexander Nunn (1833–1918), American politician
- Freddie Joe Nunn (born 1962), American former professional football player
- Frederick Nunn (1837–1870), English cricketer
- John Nunn (born 1955), English chess grandmaster
- Judy Nunn (born 1945), Australian actress and author
- Kem Nunn (21st century), American fiction novelist
- Kendrick Nunn (born 1995), American professional basketball player
- L. L. Nunn (1853–1925), American entrepreneur and educator
- Louie B. Nunn (1924–2004), American politician
- Michael Nunn (born 1964), American boxer
- Michael Nunn (dancer) (b. 1967), British ballet dancer and choreographer
- Patrick Nunn (21st century), English composer
- Paul Nunn (1943-1995), mountaineer, author and economic historian
- Robert Nunn (disambiguation), multiple people
- Ronnie Nunn (21st century), former professional basketball referee
- Sam Nunn (born 1938), American businessman and politician
- Steve Nunn (born 1952), American politician
- Terri Nunn (born 1961), American singer and actress
- Trevor Nunn (born 1940), Olivier Award–winning English theatre director and film director
- Veronica Nunn (born 1957), American jazz singer
- Wally Nunn (1920-1965)), English footballer
- William Nunn (1879–1971), Conservative Party politician in the United Kingdom