Data Last Updated: July 1, 2025

Belknap County, NH ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Belknap, NH.	21 ZIP Codes (14 General, 3 PO Box, 2 Unique, & 2 Multi County) [More Details]
Area Code: The Telephone Area Code that are associated with Belknap, NH. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	603
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Belknap, NH from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	63,705 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	33001
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Laconia, NH
Land Area: The approximate amount of land area covered by Belknap, NH in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	402 square miles
Water Area: The approximate amount of water area covered by Belknap, NH in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	68 square miles
Coordinates: The latitude/longitude centroid coordinates for Belknap County, NH.	-71.422653, 43.517917
Quick Link: Copy the direct link to the Belknap, NHCounty page and use anywhere you like!	https://www.zip-codes.com/county/nh-belknap.asp

Belknap, NH ZIP Code Boundaries

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Belknap County, NH Covers 21 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 03103 *	General	Manchester	38,039	--
ZIP Code 03218	General	Barnstead	1,116	1.75%
ZIP Code 03220	General	Belmont	7,368	11.57%
ZIP Code 03225	General	Center Barnstead	3,799	5.96%
ZIP Code 03226	General	Center Harbor	1,145	1.80%
ZIP Code 03237	General	Gilmanton	2,478	3.89%
ZIP Code 03246	General	Laconia	16,905	26.54%
ZIP Code 03247	P.O. Box	Laconia	0	0.00%
ZIP Code 03249	General	Gilford	7,698	12.08%
ZIP Code 03252	P.O. Box	Lochmere	0	0.00%
ZIP Code 03253	General	Meredith	6,558	10.29%
ZIP Code 03254 *	General	Moultonborough	4,910	--
ZIP Code 03256	General	New Hampton	2,373	3.72%
ZIP Code 03269	General	Sanbornton	3,026	4.75%
ZIP Code 03276	General	Tilton	8,766	13.76%
ZIP Code 03289	P.O. Box	Winnisquam	0	0.00%
ZIP Code 03299	Unique	Tilton	0	0.00%
ZIP Code 03809	General	Alton	3,644	5.72%
ZIP Code 03810	General	Alton Bay	2,246	3.53%
ZIP Code 03837	General	Gilmanton Iron Works	1,471	2.31%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Belknap, NH, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Belknap, NH Information

Belknap County, NH Covers 21 ZIP Codes. This includes 14 General ZIP Codes, 3 PO Box ZIP Codes, and 2 Unique (reserved for Business and Volume Mail Receivers). There are also 2 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Belknap County.

The population for Belknap County is 63,705, according to the U.S. Census. Population Density is 158.47 persons per square mile. With 38,252 Housing Units, the Average Household Size is 2.32 persons. There are 27,027 Family Households with an Average Family Size of 2.93 persons. 5.22% of the population is without Health Insurance. The 60.70% Employment Rate is 0.90% above the national average of 59.8%.48,814 people aged 25+ have some educational achievement, with 32.57% (or 15,901 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

603 is the only area code for this area. Belknap is also located in the Eastern timezone and the current local time is shown above.

Belknap is part of the Laconia, NH Core Based Statistical Area (CBSA). Its CBSA Code is 29060.It is classified as a micro area, which means it has an urban core of at least 10,000 but less then 50,000 people.

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Belknap, NH have 32,206 Residential mailboxes and 1,833 Business mailboxes.There are 1,963 businesses with a total of 22,786 employees. That is an average of 11.6 employees per business. Annual payroll for these businesses is $1,139,377,000. Other Demographics

Belknap County Demographic Profile

Population & People

Total Population

63,705

Income

Median Household Income

$87,983

Housing

Total Housing Units

38,252

Health

Without Healthcare Coverage

5.22%

Business & Economy

Total Businesses

1,963

Families

Total Households

27,027

Employment

Employment Rate

60.70%

Education

Bachelor's Degree or Higher

32.57%

Total Population: Total number of people from the 2020 U.S. Census for Belknap, NH. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	63,705
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Belknap, NH. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	74,875
Total Households: Total number of Households from the 2020 U.S. Census for Belknap, NH. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	27,027
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	38,252
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.32
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.93

Other Belknap Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	32,206
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	1,833
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	42,335
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	25,855
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	2,568

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	1,963
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$248,584,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,139,377,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	22,786

Sum of all ZIP Codes assigned Belknap, NH as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov