McColgan is an Irish surname. Notable people with the surname include:
Aileen McColgan, British academic Bill McColgan (died 1973), American sportscaster and play-by-play announcer Caolan McColgan, Gaelic footballer Eilish McColgan (born 1990), Scottish middle-distance runner John McColgan, Irish director and co-founder of Riverdance Liz McColgan (born 1964), Scottish long-distance runner Mike McColgan, American singer Peter McColgan (born 1963), Northern Irish athlete Quinn McColgan (born 2002), American actress