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

The most populated Zip Code in Belknap County, New Hampshire is 3246, located in Laconia. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
03246Laconia16,943
03249Gilford7,725
03220Belmont7,454
03253Meredith6,701
03809Alton3,617
03225Center Barnstead3,406
03269Sanbornton2,957
03256New Hampton2,591
03237Gilmanton2,338
03810Alton Bay2,286
03837Gilmanton Iron Works1,622
03218Barnstead1,535
03226Center Harbor820