ZIP Code Tabulation Area · New Hampshire

ZIP Code 03237: Belknap County, NH

ZIP Code 03237 (Belknap County, New Hampshire) has an estimated 2,575 residents in 1,097 households. The median household income is $111,359, the median home value is $345,400 and the median gross rent is —. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

2,575

Margin of error ±456

Median household income

$111,359

Margin of error ±$14,336

Median home value

$345,400

Margin of error ±$36,742

Median gross rent

—

Margin of error not available

Median age

43.2 yrs

Margin of error ±4.6 yrs

Mean travel time to work

33.0 min

Margin of error ±12.6 min

How ZIP 03237 compares with New Hampshire and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 0323743.2 yrsNew Hampshire43.3 yrsUnited States38.9 yrs

Median household income

ZIP 03237$111,359New Hampshire$99,031United States$80,734

Per capita income

ZIP 03237$52,479New Hampshire$52,798United States$44,673

Poverty rate

ZIP 032375.4%New Hampshire7.2%United States12.5%

Unemployment rate

ZIP 032377.4%New Hampshire3.3%United States5.2%

Bachelor's degree or higher

ZIP 0323736.1%New Hampshire40.6%United States35.7%

Median home value

ZIP 03237$345,400New Hampshire$402,500United States$332,700

Median gross rent

ZIP 03237—New Hampshire$1,491/moUnited States$1,413/mo

Owner-occupied homes

ZIP 0323798.9%New Hampshire72.8%United States65.2%

Mean travel time to work

ZIP 0323733.0 minNew Hampshire26.7 minUnited States26.4 min

Worked from home

ZIP 032378.2%New Hampshire16.8%United States15.1%

All figures for ZIP 03237

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 03237 — ACS 2020–2024 5-year estimates
Measure	ZIP 03237	Margin of error	New Hampshire	United States
Total population	2,575	±456	1,394,868	334,922,499
Median age	43.2 yrs	±4.6 yrs	43.3 yrs	38.9 yrs
Households	1,097	±205	555,822	129,227,496
Median household income	$111,359	±$14,336	$99,031	$80,734
Per capita income	$52,479	±$8,289	$52,798	$44,673
Poverty rate	5.4%	±5.0 pts	7.2%	12.5%
Unemployment rate	7.4%	±6.5 pts	3.3%	5.2%
Bachelor's degree or higher	36.1%	±7.8 pts	40.6%	35.7%
Median home value	$345,400	±$36,742	$402,500	$332,700
Median gross rent	—	—	$1,491/mo	$1,413/mo
Owner-occupied homes	98.9%	±3.3 pts	72.8%	65.2%
Mean travel time to work	33.0 min	±12.6 min	26.7 min	26.4 min
Worked from home	8.2%	±5.4 pts	16.8%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 03237
Group	ZIP 03237	New Hampshire	United States
White alone, not Hispanic or Latino	93.7%	86.9%	57.4%
Black or African American alone, not Hispanic or Latino	0.0%	1.3%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.0%	0.1%	0.5%
Asian alone, not Hispanic or Latino	0.0%	2.6%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.0%	0.0%	0.2%
Some other race alone, not Hispanic or Latino	0.0%	0.4%	0.6%
Two or more races, not Hispanic or Latino	3.8%	4.0%	4.3%
Hispanic or Latino (of any race)	2.4%	4.7%	19.3%

Where ZIP 03237 is

State: New Hampshire
Main county: Belknap County
Land area: 37.96 sq mi· about 68 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Belknap County

03218 Belknap County, NH 03220 Belknap County, NH 03225 Belknap County, NH 03226 Belknap County, NH 03246 Laconia, NH 03249 Belknap County, NH 03253 Belknap County, NH 03256 Belknap County, NH 03269 Belknap County, NH 03809 Belknap County, NH 03810 Belknap County, NH 03837 Belknap County, NH

See every ZIP code in New Hampshire, or compare ZIP 03237 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.