There are 14 zip codes in Belknap County, New Hampshire. The most populated is 3246, located in Laconia. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
324616,943Laconia
32768,811Tilton
32497,725Gilford
32207,454Belmont
32536,701Meredith
38093,617Alton
32253,406Center Barnstead
32692,957Sanbornton
32562,591New Hampton
32372,338Gilmanton
38102,286Alton Bay
38371,622Gilmanton Iron Works
32181,535Barnstead
3226820Center Harbor
showing: 14 rows

Zip Codes in Belknap County, New Hampshire by Population (2024)