Wellesley /ˈwɛlzliː/ is a town in Norfolk County, Massachusetts, United States. It is part of Greater Boston. The population was 27,982 at the time of the 2010 census. It is best known as the home of Wellesley College, Babson College, and a campus of Massachusetts Bay Community College. Olin College, an engineering school, has a campus that spans from Needham, Massachusetts into Wellesley and is adjacent to Wellesley's Babson College.