Callanan is an Irish surname. Notable people with the surname include:
Aonghus Callanan (born 1985), Irish sportsman
Colm Callanan (born 1982), Irish sportsperson
Fionnbar Callanan, Irish sports photographer
Ian Callanan (born 1971), Irish composer
James J. Callanan (1842–1900), businessman and politician
James Joseph Callanan (1795–1829), Irish poet
Jeremiah Joseph Callanan (1795–1829), Irish poet
Joe Callanan (born 1949), Irish politician
John Joe Callanan (1894–1970), Irish sportsperson
Johnny Callanan (1910–1982), Irish politician
Liam Callanan, American author and professor of English
Martin Callanan (born 1961), British politician
Martin John Callanan (born 1982), artist
Michael Callanan (1849–1929), politician
Peter Callanan (1935–2009), Irish politician
Séamus Callanan (born 1988), hurler
