Callanan is an Irish surname. Notable people with the surname include:
Aonghus Callanan (born 1985), Irish sportsmanColm Callanan (born 1982), Irish sportspersonFionnbar Callanan, Irish sports photographerIan Callanan (born 1971), Irish composerJames J. Callanan (1842–1900), businessman and politicianJames Joseph Callanan (1795–1829), Irish poetJeremiah Joseph Callanan (1795–1829), Irish poetJoe Callanan (born 1949), Irish politicianJohn Joe Callanan (1894–1970), Irish sportspersonJohnny Callanan (1910–1982), Irish politicianLiam Callanan, American author and professor of EnglishMartin Callanan (born 1961), British politicianMartin John Callanan (born 1982), artistMichael Callanan (1849–1929), politicianPeter Callanan (1935–2009), Irish politicianSéamus Callanan (born 1988), hurler