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ZIP codes

ZIP codes in Merrimack County, New Hampshire

Merrimack County has 29 ZIP codes. 25 lie entirely inside it and 4 are shared with neighboring counties, so part of their land and their people are elsewhere. About 155,947 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
29
2 more just touch the border (under 1% of their land)
Entirely inside
25
99% or more of their land
Shared with other counties
4
Most with Belknap County (2)
Most populated ZIP
03301
33,995 people · Concord
Least populated ZIP
03231
89 people
Largest ZIP by land
03303
68 sq mi · Concord

Map of the ZIP codes in Merrimack County

Belknap County Grafton County Hillsborough County Rockingham County Strafford County Sullivan County 03046 · 3,097 people · 100% in the county 03104 · Manchester · 35,237 people · 0.5% in the county 03106 · South Hooksett · 15,032 people · 100% in the county 03216 · 2,046 people · 100% in the county 03220 · Belmont · 7,393 people · 1.2% in the county 03221 · Bradford · 2,200 people · 100% in the county 03224 · Concord · 2,392 people · 100% in the county 03229 · Contoocook · 6,046 people · 100% in the county 03230 · 1,451 people · 100% in the county 03231 · 89 people · 100% in the county 03233 · 156 people · 100% in the county 03234 · 4,939 people · 100% in the county 03235 · Franklin · 8,903 people · 100% in the county 03242 · Henniker · 6,197 people · 100% in the county 03243 · 952 people · 94% in the county 03255 · Blodgett Landing · 2,015 people · 100% in the county 03257 · New London · 4,484 people · 97% in the county 03258 · 2,721 people · 100% in the county 03260 · 976 people · 100% in the county 03261 · 4,688 people · <0.1% in the county 03263 · Pittsfield · 4,105 people · 100% in the county 03268 · 1,468 people · 100% in the county 03273 · 361 people · 100% in the county 03275 · Suncook · 12,205 people · 100% in the county 03276 · Tilton Northfield · 9,015 people · 72% in the county 03278 · Warner · 3,079 people · 100% in the county 03287 · 1,487 people · 100% in the county 03301 · Concord · 33,995 people · 100% in the county 03303 · Concord · 16,571 people · 100% in the county 03304 · 8,335 people · 100% in the county 03307 · Loudon · 5,724 people · 100% in the county
  • Entirely in the county (99% or more of its land)
  • Shared, mostly in this county
  • Shared, mostly in other counties
  • Neighboring counties
Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Merrimack County

29 ZIP codes in Merrimack County, NH, by number
ZIP code Main city Population Land in the county Residents in the county
03046 — 3,097 100% 3,097
03106 South Hooksett 15,032 100% 15,032
03216 — 2,046 100% 2,046
03220 Belmont 7,393 1.2% ≈ 61
03221 Bradford 2,200 100% 2,200
03224 Concord 2,392 100% 2,392
03229 Contoocook 6,046 100% 6,046
03230 — 1,451 100% 1,451
03231 — 89 100% 89
03233 — 156 100% 156
03234 — 4,939 100% 4,939
03235 Franklin 8,903 100% 8,903
03242 Henniker 6,197 100% 6,197
03243 — 952 94% ≈ 903
03255 Blodgett Landing 2,015 100% 2,015
03257 New London 4,484 97% ≈ 4,445
03258 — 2,721 100% 2,721
03260 — 976 100% 976
03263 Pittsfield 4,105 100% 4,105
03268 — 1,468 100% 1,468
03273 — 361 100% 361
03275 Suncook 12,205 100% 12,205
03276 Tilton Northfield 9,015 72% ≈ 4,933
03278 Warner 3,079 100% 3,079
03287 — 1,487 100% 1,487
03301 Concord 33,995 100% 33,995
03303 Concord 16,571 100% 16,571
03304 — 8,335 100% 8,335
03307 Loudon 5,724 100% 5,724

They also touch the county with under 1% of their land, so they aren’t counted: 03104 and 03261.

ZIP codes shared with other counties

These 4 ZIP codes have part of their land in another county. The first figure is the share of their land in Merrimack County; then, where the rest lies.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Concord (3), Belmont (1), Blodgett Landing (1), Bradford (1), Contoocook (1), and Franklin (1); 14 places in all.

They start with 4 different three-digit prefixes, one per USPS sorting center: 030, 031, 032, and 033.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

  • U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
  • U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
  • U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
  • U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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