Hainsworth is a surname. Notable people with the surname include:
George Hainsworth (1893–1950), Canadian ice hockey player Herb Hainsworth (1881–1955), Australian rules footballer Zarin Hainsworth (born 1959), British women’s rights activist Isis Hainsworth (born 1998), Scottish actress Michael Hainsworth, Canadian business reporter Sarah Hainsworth (born 1967), British university administrator