According to the United States Census Bureau, the town has a total area of 38.5 square miles (99.6 km²), of which, 38.3 square miles (99.2 km²) of it is land and 0.1 square miles (0.4 km²) of it (0.36%) is water. North Berwick is drained by the Great Works River and its tributary, the Negutaquet River. Bauneg Beg Hill, elevation 866 feet (264 m) above sea level, is the town's highest point.

North Berwick Area Code is 207

• Town of North Berwick, ME - PO Box 422 Noth Berwick, Maine 03909
• D.A.Hurd Library - 41 High Street North Berwick, Maine 03906.
  Phone:207-676-2215