Carlisle was first settled in 1650, and twice became a district, first in 1754 and then again in 1780, just after the American Revolution, before incorporation as a town in 1805. Carlisle today is a community of about 5100 residents. Carlisle's unique features include its rural appearance and strong community spirit. Although there are no industrial parks, no apartment complexes, no condominiums, no traffic lights, and no fast food, Carlisle is still within 40 minutes of Boston, and is convenient to four major shopping areas. Approximately 25% of the town is protected conservation land.