According to the United States Census Bureau, the town has a total area of 22.3 square miles (57.7 km²), of which, 22.1 square miles (57.2 km²) of it is land and 0.2 square miles (0.5 km²) of it (0.81%) is water. Cornish is drained by the Ossipee River and the Saco River.The town is crossed by state routes 5, 25 and 160. Cornish borders the towns of Hiram to the north, Baldwin to the northeast, Limington to the east, Limerick to the south, and Parsonsfield to the west.

Cornish Area Code is 207

• Town of Cornish, ME - P.O. Box 400, Cornish, ME 04020-0400
  Phone:207-625-4324 Fax:207-625-4416
• Bonney Memorial Library - 36 Main StreetPO Box 857,Cornish, Maine 04070-0857
  Phone:207-625-8083