Carlisle is a town northwest of Boston located in Middlesex County, Massachusetts, United States. As of the 2010 U.S. Census, the population of the town was 4,852.
Carlisle is located about 8 miles (13 km) south-southwest of Lowell and 19 miles (31 km) northwest of Boston. It borders the towns of Concord, Acton, Westford, Chelmsford, Billerica, and Bedford.
According to the United States Census Bureau, the town has a total area of 15.5 square miles (40 km2), of which 15.4 square miles (40 km2) is land and 0.2 square miles (0.52 km2) (1.09%) is water.
Conservation land makes up about a quarter of the town's area. Besides town-owned land overseen by the town's conservation committee, Carlisle is home to Great Brook Farm State Park and a portion of the Great Meadows National Wildlife Refuge neighboring the Concord River.
s Image: By Wesp (Own work) [CC-BY-SA-3.0], via Wikimedia Commons