According to the United States Census Bureau, the town has a total area of 82.5 square miles (213.6 km²), of which, 11.6 square miles (30.1 km²) of it is land and 70.8 square miles (183.5 km²) of it (85.89%) is water. At its widest points, the island of North Haven is roughly 12 miles (19 km) long and 3 miles (4.8 km) wide. It is situated in Penobscot Bay and the Gulf of Maine, part of the Atlantic Ocean.

North Haven Area Code is 207

• Town of North Haven, ME - P.O. Box 400, North Haven, ME 04853
  Telephone: 207-867-4433 Fax: 207- 867-2207
• North Haven Community School: North Haven Community School is the sole preK-12 school of Maine School Administrative District # 7. The school is fully accredited by the New England Association of Schools and Colleges, the only Maine island school, and one of only a handful of public K-12 schools in New England, to have earned that distinction.
  - 93 Pulpit Harbor Road, North Haven, Maine 04853
  Phone: 207-867-4707 Fax: 207-867-4438
• North Haven Arts & Enrichment: North Haven Arts & Enrichment will raise and provide funds for arts and enrichment programs and experiences for North Haven residents of all ages but primarily for North Haven Community School students and pre-school age children.
  - Waterman’s Community Center, 12 Main Street, PO Box 474, North Haven, ME 04853
  Telephone: 207-867-2100 Fax: 207-867-2129
• North Island Fiber Shoppe: North Island Fiber Shoppe offer natural fiber yarns & gifts from various Maine island communities as well as New England farms and cottage companies in their efforts to support the sustainability of small farms and businesses.
  - 12 Pulpit Harbor Road, North Haven Island, Maine 04853
  Phone/Fax: 207-867-4859