ZIP Codes of Carroll County, NH

Population & People
Population & People
Total Population
53,390
Household Income
Household Income
Median Income
$89,411
Housing
Housing
Total Housing Units
41,233
Business & Economy
Business & Economy
Total Businesses
1,920
Employment
Employment
Employment Rate
55.66%
Education
Education
Bachelor's Degree+
38.22%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 31 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:31 ZIP Codes (27 Standard, 4 PO Box, 0 Unique) [See All]
Area Code:603
Timezone:Eastern (GMT -05:00)
Local Time:2:13:09 PM
Population:53,390 [See All]
FIPS:33003
Land Area:1,171 sq mi
Water Area:62 sq mi
Coordinates:43.8409, -71.2029
Quick Link:
https://www.zip-codes.com/county/nh-carroll.asp
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New Hampshire's fastest-growing county
Population up 8.5% over the past decade.
Notable income spread
Median income ranges $56,951 to $146,917 across ZIPs — a 2.6× gap.
Wide geographic spread
ZIPs range from 152.3 sq mi down to 2.52 — a 60× sprawl ratio.
Striking education divide
Bachelor's share spans 18.9% to 67.7% — a 49-point gap.

Standout ZIPs in this County


Most Populous
Wolfeboro · 6,554 people
12.3% of county total
Highest Income
Center Sandwich · $146,917 median
1.6× county average
Largest Land Area
Jackson · 152.3 sq mi
Spans the most ground
Fastest Growth
Effingham · 40.4% (10-yr)
1,362 → 1,912 residents
Most Educated
Center Sandwich · 64.6% bachelor's+
786 of 1,216 adults 25+

Things worth knowing about Carroll County


53,390 residents live across 31 ZIPs covering 1,171 sq mi, served by 31 distinct USPS-recognized cities.

Population moved from 49,210 to 53,382 from 2014 to 2024 — a +8.5% change. 17 ZIPs gained residents, 12 lost.

The county's wealthiest ZIP 03227 (Center Sandwich, $146,917 median) and poorest ZIP 03813 (Center Conway, $56,951) are 27.1 miles apart — a 2.6× income gap across local geography.

Median home values vary 2.9× across this county — from $252,200 in 03813 (Center Conway) to $719,300 in 03846 (Jackson).

Density varies 28× across the county — from 6 people/sq mi in 03846 (Jackson) to 166 in 03850 (Melvin Village).

Educational attainment ranges from 14.9% bachelor's+ in 03850 (Melvin Village) to 67.7% in 03846 (Jackson) — the breadth of educational profiles across the area.

Within New Hampshire, this is the #8 most populous of 11 counties and ranks #8 for median household income with the #1 fastest decade growth .

Weighted by population, the typical household earns about $89,085 across the county — reflecting what a typical resident sees, not a simple ZIP average.

38.2% of adults age 25+ hold a bachelor's degree or higher (16,164 of 42,289 reporting).

27 Standard delivery, 4 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Carroll County


Higher-education hub

1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.

Center Sandwich
64.6%
1,388 residents

Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
1,171
square miles
Avg density
45.6
people per sq mi
Population
53,390
across 31 ZIPs
Jackson
152.3 sq mi
897 residents
Center Conway
121.5 sq mi
4,273 residents
Bartlett
105.5 sq mi
1,116 residents

All ZIP Codes in Carroll County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
03894WolfeboroStandard6,554$94,34958.55.2%
03254MoultonboroughStandard5,172$106,44075.827.6%
03872SanbornvilleStandard4,438$109,58356.027.9%
03813Center ConwayStandard4,273$56,951121.523.1%
03818ConwayStandard3,805$77,13487.46.2%
03860North ConwayStandard3,693$71,75943.5-10.6%
03814Center OssipeeStandard2,324$77,13855.7-3.7%
03864OssipeeStandard2,131$104,48539.138.1%
03882EffinghamStandard1,912$76,60740.240.4%
03887UnionStandard1,739$91,87519.2-13.2%
03886TamworthStandard1,618$74,45031.2-25.2%
03816Center TuftonboroStandard1,538$88,97119.222.8%
03836FreedomStandard1,494$66,13644.125.0%
03849MadisonStandard1,465$96,43930.45.0%
03227Center SandwichStandard1,388$146,91751.021.1%
03830East WakefieldStandard1,381$99,96011.2-28.3%
03845IntervaleStandard1,173$57,32013.90.9%
03812BartlettStandard1,116105.564.6%
03817ChocoruaStandard1,0666.689.3%
03875Silver LakeStandard1,005$115,58320.4-8.1%
03838GlenStandard983$68,38521.3-1.1%
03846JacksonStandard897$117,986152.3-12.7%
03853Mirror LakeStandard656$103,90015.7-11.0%
03832Eaton CenterPO Box501$79,0630.044.0%
03850Melvin VillagePO Box324$101,2981.921.3%
03259North SandwichStandard252$84,87236.0-20.8%
03883South TamworthStandard233$67,6794.9137.8%
03890West OssipeeStandard1642.5-52.5%
03847KearsargePO Box870.0-64.5%
03897WonalancetStandard86.0
03896Wolfeboro FallsPO Box0.0

Adjacent & Nearby Counties