Arrowsic is a town in Sagadahoc County, Maine, United States. The population is 477 as of the 2020 United States Census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area. During the French and Indian Wars, Arrowsic was site of a succession of important and embattled colonial settlements. It is a favorite with artists and birdwatchers.

Sagadahoc County is a county located in the U.S. state of Maine. As of the 2020 census, the population was 36,699. Its county seat is Bath. In geographic area, it is the smallest county in Maine.