Cosgrave is an Irish surname. Notable people with the surname include:

• Fran Cosgrave (born 1977), Irish nightclub owner

• James Cosgrave (1865–1936), Irish politician

• James Cosgrave (cricketer) (born 1932), Australian cricketer

• John B. Cosgrave (born 1946), Irish mathematician

• Lawrence Moore Cosgrave (1890–1971), Canadian soldier and diplomat

• Liam Cosgrave (1920–2017), Irish politician, fifth Taoiseach

• Liam T. Cosgrave (born 1956), Irish politician

• Michael Joe Cosgrave (1938–2022), Irish politician

• Niamh Cosgrave (born 1964), Irish politician

• Philip Cosgrave (1884–1923), Irish politician

• W. A. Cosgrave (1879–1952), British civil servant in India

• W. T. Cosgrave (1880–1965), Irish politician, President of the Executive Council of the Irish Free State from 1922 to 1932

See also

• Cosgrove (disambiguation)