Acton is a town in York County, Maine, United States. The population was 2,671 at the 2020 census. It includes the villages of Acton, Miller Corner and South Acton. The town is home to the Acton Fairground, which holds the Acton Fair every late summer. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area.
It was part of the extensive Ossipee Tract sold on November 28, 1668, by Newichawannock Chief Captain Sunday (or Wesumbe) to Francis Small, a trader from Kittery. Small sold a half interest in the tract to Major Nicholas Shapleigh of Eliot. In 1770, heirs found the unrecorded deed and divided the land, with Shapleigh's descendants awarded one half of Limerick and all of Parsonsfield and Shapleigh. First called Hubbardstown Plantation, Shapleigh was in 1785 incorporated and named in honor of Nicholas Shapleigh. Its western portion was set off and incorporated on March 6, 1830, as Acton, named after Acton, England.