Cosgrave is a surname, an it mey refer tae:
- Fran Cosgrave (born 1977), Erse nichtclub owner
- James Cosgrave (dee'd 1936), Erse naitionalist politeecian
- John B. Cosgrave (born 1946), heid o the mathematics depairtment o St. Patrick's College
- Lawrence Moore Cosgrave (1890–1971), Canadian signatory tae the Japanese Instrument o Surrender at the end o Warld War II
- Liam Cosgrave (1920–2017), fift Taoiseach o Ireland
- Liam T. Cosgrave (born 1956), umwhile Fine Gael politeecian in the Republic o Ireland
- Michael Joe Cosgrave (born 1938), Erse Fine Gael politeecian
- Niamh Cosgrave (born 1964), umwhile Fine Gael pairty politeecian frae Dublin, Ireland
- Philip Cosgrave (dee'd 1923), Erse Cumann na nGaedhael pairty politeecian
- W.T. Cosgrave (1880–1965), Erse politeecian