Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/NH/COUNTY/BELKNAP

Belknap County, NH ZIP codes

There are 18 ZIP codes in Belknap County, NH, in 16 towns, from 03218 to 03837. The largest are 03246 (Laconia), 03249 (Gilford) and 03220 (Belmont).

The county seat is Laconia.

ZIP codes
18
Towns
16
County seat
Laconia
County FIPS
33001
Population
64,659
Median household income
$92,783
Land area
402 sq mi
Area code
603
Metro area
Laconia

Belknap County ZIP codes by town

Laconia (county seat)
03246, 03247

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Belknap County ZIP codes

032180322003225032260323703246032470324903252032530325603269032890329803299038090381003837

The ZIP codes of Belknap County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Belknap County in numbers

About 64,659 people live in Belknap County, in 26,337 households, the 7th most populous of New Hampshire's 10 counties. The median household income is $92,783 a year, 6% below the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $374,900 (7% below the New Hampshire median), and median gross rent is $1,167 a month. The median age is 48.4; 33.6% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire); the average commute takes 25 minutes.

Population64,659Belknap64,659
Households26,337Belknap26,337
Median age48.4Belknap48.4New Hampshire43.3US 38.9
Median household income$92,783Belknap$92,783New Hampshire$99,031US $80,734
Median home value$374,900Belknap$374,900New Hampshire$402,500US $332,700
Median gross rent$1,167Belknap$1,167New Hampshire$1,491US $1,413
Bachelor's degree or higher33.6%Belknap33.6%New Hampshire40.6%US 35.7%
Mean commute25.0 minBelknap25.0 minNew Hampshire26.7 minUS 26.4 min
Population density161 / sq miBelknap161 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Belknap County

Largest towns in Belknap County
TownZIP codesPopulation
Laconia 2 17,085
Gilford 1 7,830
Center Barnstead 1 3,834
Sanbornton 1 3,066
Meredith 1 2,617
Gilmanton 1 2,575
Alton Bay 1 2,314
Gilmanton Iron Works 1 1,451
Belmont 1 1,378
Barnstead 1 1,160
Center Harbor 1 1,005
New Hampton 1 302
Alton 1 281

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Belknap County.

Not sure you are in Belknap County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Belknap County, with figures

ZIP codes in Belknap County
ZIP City Type Population Median income Median home
03218 Barnstead , NH Standard 1,160 $112,500 $346,900
03220 Belmont , NH Standard 7,393 $68,242 $316,200
03225 Center Barnstead , NH Standard 3,834 $111,660 $368,400
03226 Center Harbor , NH Standard 1,005 $107,500 $462,800
03237 Gilmanton , NH Standard 2,575 $111,359 $345,400
03246 Laconia , NH Standard 17,103 $73,241 $339,700
03247 Laconia , NH No street area — — —
03249 Gilford , NH Standard 7,830 $116,635 $456,500
03252 Lochmere , NH No street area — — —
03253 Meredith , NH Standard 6,707 $84,719 $482,700
03256 New Hampton , NH Standard 2,497 $87,917 $382,000
03269 Sanbornton , NH Standard 3,066 $107,083 $450,000
03289 Winnisquam , NH No street area — — —
03298 Tilton , NH No street area — — —
03299 Tilton , NH No street area — — —
03809 Alton , NH Standard 3,680 $106,397 $387,500
03810 Alton Bay , NH Standard 2,314 $148,261 $569,200
03837 Gilmanton Iron Works , NH Standard 1,451 $119,712 $409,600

Cite this page

zipcodes.pro. “Belknap County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/nh/county/belknap

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