Nunn may refer to:
- Alan Nunn May (1911–2003), English physicist
- Nunn, Colorado, United States
- Nunn (crater), a lunar impact crater
People with the surname Nunn:
- Anthony Nunn (born 1927), British field hockey player
- Bill Nunn (born 1953), American actor
- Bill Nunn (American football) (born 1925), American journalist and American football scout
- Bobby Nunn (1925–1986), American singer
- David Alexander Nunn (1833–1918), American politician
- Freddie Joe Nunn (born 1962), American former professional football player
- Gary P. Nunn (21st century), American country musician
- Glynis Nunn (born 1960), former Australian heptathlete
- John Nunn (born 1955), one of England's strongest chess players
- Joseph Nunn (1905–1968), American engineer
- Judy Nunn (born 1945), Australian actress and author
- Kem Nunn (21st century), American fiction novelist
- L. L. Nunn (1853–1925), American entrepreneur and educator
- Louie B. Nunn (1924–2004), American politician
- Michael Nunn (born 1964), American boxer
- Patrick Nunn (21st century), English composer
- Robert Nunn (21st century), American football coach
- 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 (21st century), American jazz singer
- William Nunn (1879–1971), Conservative Party politician in the United Kingdom