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/COOS

Coos County, NH ZIP codes

There are 15 ZIP codes in Coos County, NH, in 15 towns, from 03570 to 03598. The largest are 03570 (Berlin), 03584 (Lancaster) and 03598 (Whitefield). 1 more crosses into it from a neighbouring county: 03579.

The county seat is Lancaster.

ZIP codes
15
Partly in it
1 more
Towns
15
County seat
Lancaster
County FIPS
33007
Population
31,271
Median household income
$57,677
Land area
1,795 sq mi

Coos County ZIP codes by town

Lancaster (county seat)
03584

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.

ZIP codes partly in Coos County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Coos County.

Map of Coos County ZIP codes

035700357503576035810358203583035840358803589035900359203593035950359703598

The ZIP codes of Coos 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.

Coos County in numbers

About 31,271 people live in Coos County, in 14,002 households, the 10th most populous of New Hampshire's 10 counties. The median household income is $57,677 a year, 42% below the New Hampshire median of $99,031 (US: $80,734). The median owner-occupied home is valued at $188,900 (53% below the New Hampshire median), and median gross rent is $876 a month. The median age is 50.3; 20.1% of adults 25 and over hold a bachelor's degree or higher (40.6% across New Hampshire); the average commute takes 23 minutes.

Population31,271Coos31,271
Households14,002Coos14,002
Median age50.3Coos50.3New Hampshire43.3US 38.9
Median household income$57,677Coos$57,677New Hampshire$99,031US $80,734
Median home value$188,900Coos$188,900New Hampshire$402,500US $332,700
Median gross rent$876Coos$876New Hampshire$1,491US $1,413
Bachelor's degree or higher20.1%Coos20.1%New Hampshire40.6%US 35.7%
Mean commute23.1 minCoos23.1 minNew Hampshire26.7 minUS 26.4 min
Population density17 / sq miCoos17 / 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 Coos County

Largest towns in Coos County
TownZIP codesPopulation
Berlin 1 9,383
Lancaster 1 2,230
Gorham 1 2,092
Milan 1 1,633
Whitefield 1 1,512
North Stratford 1 1,297
Colebrook 1 1,268
Pittsburg 1 1,054
Jefferson 1 1,013
Groveton 1 834
Twin Mountain 1 648
Randolph 1 465
West Stewartstown 1 312
Bretton Woods 1 11

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 Coos County.

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

Every ZIP code in Coos County, with figures

ZIP codes in Coos County
ZIP City Type Population Median income Median home
03570 Berlin , NH Standard 9,383 $45,180 $131,000
03575 Bretton Woods , NH Standard 11 — —
03576 Colebrook , NH Standard 2,764 $52,682 $214,900
03581 Gorham , NH Standard 3,246 $64,127 $196,400
03582 Groveton , NH Standard 1,949 $46,250 $122,300
03583 Jefferson , NH Standard 1,013 $67,188 $296,700
03584 Lancaster , NH Standard 3,501 $66,768 $209,500
03588 Milan , NH Standard 1,633 $71,538 $253,500
03589 Mount Washington , NH No street area — — —
03590 North Stratford , NH Standard 1,297 $52,803 $166,500
03592 Pittsburg , NH Standard 1,054 $61,094 $279,500
03593 Randolph , NH Standard 465 $101,750 $407,000
03595 Twin Mountain , NH Standard 648 $64,762 $258,900
03597 West Stewartstown , NH Standard 527 $56,010 —
03598 Whitefield , NH Standard 3,396 $67,179 $227,600

Cite this page

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

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