Gerosa is a surname. Notable people with the surname include:
Augusto Gerosa (1909-?), Italian ice hockey player Carlo Gerosa (born 1964), Italian alpine skier Gaston Gerosa (born 1923), Swiss cyclist Lawrence E. Gerosa (1894–1972), Italian-born American politician Mario Gerosa (born 1967), Argentine-born Italian rugby union player Mauro Gerosa (born 1974), Italian racing cyclist Vincenza Gerosa (1784–1847), Italian Roman Catholic nun