McMonagle is a surname. Notable people with the surname include:
Donald R. McMonagle (born 1952), manager, Launch Integration, at the Kennedy Space Center, Florida Gerald McMonagle (born 1936), former Democratic member of the Pennsylvania House of Representatives Gerry McMonagle, political figure in Ireland Hugh McMonagle (1817–1889), inn-keeper and political figure in New Brunswick John I. McMonagle (1913–1992), former Democratic member of the Pennsylvania House of Representatives John McMonagle, judge and political figure in Nova Scotia
See also McGonagle