Fitzwilliam, NH is a city located in Cheshire County, New Hampshire and has a land area of 34.64 square miles (89.72 km2). The water area for the city is 1.40 square miles or 3.63 km2. There is one unique zip code in Fitzwilliam, New Hampshire and it is 03447. The area code(s) for Fitzwilliam is 603.
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