Gilbert Baker may refer to:
Gilbert Baker (artist) (1951–2017), American artist; designer of the rainbow flag Gilbert Baker (politician) (born 1956), Republican politician in the U.S. state of Arkansas Gilbert Baker (bishop) (1910–1986), Anglican Bishop of Hong Kong and Macau Gilbert-Baker Wildlife Management Area, a wildlife management area in Nebraska
See also Edmund Gilbert Baker (1864–1949), English plant collector and botanist; son of John Gilbert Baker James Gilbert Baker (1914–2005), US astronomer and designer of optics systems John Gilbert Baker (1834–1920), English botanist Gilbert Barker (1882–1952), Australian rules footballer