Wellesley ( /wɛlzliː/) 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 and Babson College. The Hunnewell Arboretum abuts the Wellesley campus, and the Elm Bank Horticulture Center has its entrance in Wellesley, although it is located across a small private bridge over the Charles River and is therefore in the neighboring town of Dover. The town is noted for being among the most expensive zip codes in the United States, and likewise for possessing the second greatest concentration of residents with advanced degrees in the country. The public education services of the town are very well regarded, especially Wellesley High School; in 2007 it was ranked 70th best public high school in the nation by U.S. News & World Report, earning a Gold Medal.
Wellesley was settled in the 1630s as part of Dedham, Massachusetts. It was subsequently a part of Needham, Massachusetts called West Needham, Massachusetts. On Oct. 23, 1880, West Needham residents voted to secede from Needham and the town of Wellesley was later christened by the Massachusetts legislature on April 6, 1881.
Wellesley's population grew by over 80 percent during the 1920s.