McGeer is a surname. Notable people with the surname include:
Allison McGeer (born 1953), Canadian infectious diseases specialist Edith Graef McGeer (1923–2023), American-Canadian neuroscientist Gerry McGeer (1888–1947), Canadian lawyer and politician Manfred McGeer (1893–1955), Canadian politician Pat McGeer (1927–2022), Canadian physician and basketball player
See also John McGeer House, a historic house in New York, United States