Thornton Zip Codes - Grafton County NH

Thornton, NH Zip Code Map

Thornton, NH is a city located in Grafton County, New Hampshire and has a land area of 50.09 square miles (129.73 km2). The water area for the city is 0.60 square miles or 1.55 km2. There is one unique zip code in Thornton, New Hampshire and it is 03285. The area code(s) for Thornton is 603.

Zip Codes for Thornton, NH (1)
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03285 Thornton Grafton

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