McKeag is a surname. Notable people with the surname include:
Anna Jane McKeag (1864–1947), American psychologist and college president Billy McKeag (born 1945), Northern Irish footballer Gordon McKeag (1928–2005), English solicitor and sports executive Stephen McKeag (1970–2000), Northern Irish loyalist William McKeag (1897–1972), British politician, soldier and solicitor William John McKeag (1928–2007), Canadian politician