Nunan (, and ) is an Irish surname. Notable people with the surname include:
Mick Nunan (born 1949), former Australian rules football player David Nunan (born 1949), Australian linguist Joseph Nunan (1842–1885), Irish born patriot and builder Paul Nunan (1858–1934), Australian educationalist Sheila Nunan, General Secretary of the Irish National Teachers' Organisation Joseph D. Nunan, Jr. (1897–1968), American politician
See also Noonan