Concannon (other spellings Concanen, Concanon, Conceanainn, Con Ceanainn, and Kincannon, among others) is an Irish family name. Notable people with the surname include:

• Brian Concannon (born 1963), human rights lawyer and foreign policy advocate
• Brian Concannon (hurler) (born 1997), Irish hurler
• Helena Concannon (née Walsh; 1878–1952), politician, historian, author and scholar.
• James Concannon (1890–1973), Australian politician
• John Concannon, Irish businessman
• Eóin Concannon (died 1954), king of the Claddagh
• Paddy Concannon (1918–2012), president of the ITCCA
• Susan Concannon (born 1958), American politician

Other spellings

• Muirgeas ua Cú Ceanainn (died 1037), king of Uí Díarmata and chief of the name
• Richard Luke Concanen (1747–1810), first bishop of New York, 1808–1810
• Edmund Concanon (1816–1902), Irish solicitor and town commissioner
• Tomás Bán Ó Conceanainn (1870–1946), writer and historian