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ZIP codes

ZIP codes in South Central Connecticut Planning Region, Connecticut

South Central Connecticut Planning Region has 24 ZIP codes. 23 lie entirely inside it and 1 are shared with neighboring counties, so part of their land and their people are elsewhere. About 570,182 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes
24
1 more just touches the border (under 1% of their land)
Entirely inside
23
99% or more of their land
Shared with other counties
1
Most with Naugatuck Valley Planning Region (1)
Most populated ZIP
06516
55,351 people · West Haven
Least populated ZIP
06510
4,584 people · New Haven
Largest ZIP by land
06437
47 sq mi · Guilford Center

Map of the ZIP codes in South Central Connecticut Planning Region

Capitol Planning Region Greater Bridgeport Planning Region Lower Connecticut River Valley Planning Region Naugatuck Valley Planning Region 06405 · Branford Center · 28,217 people · 100% in the county 06410 · Cheshire Village · 28,904 people · <0.1% in the county 06437 · Guilford Center · 22,067 people · 100% in the county 06443 · Madison Center · 17,657 people · 100% in the county 06450 · Meriden · 35,694 people · 100% in the county 06451 · Meriden · 24,851 people · 99.8% in the county 06460 · Milford city (balance) · 37,649 people · 100% in the county 06461 · Milford city (balance) · 15,035 people · 100% in the county 06471 · 7,140 people · 100% in the county 06472 · Northford · 6,363 people · 100% in the county 06473 · North Haven · 24,743 people · 100% in the county 06477 · Orange · 14,315 people · 100% in the county 06492 · Wallingford Center · 44,498 people · 98% in the county 06510 · New Haven · 4,584 people · 100% in the county 06511 · New Haven · 54,730 people · 100% in the county 06512 · East Haven · 28,830 people · 100% in the county 06513 · New Haven · 38,888 people · 100% in the county 06514 · New Haven · 26,803 people · 100% in the county 06515 · New Haven · 19,006 people · 100% in the county 06516 · West Haven · 55,351 people · 100% in the county 06517 · 14,221 people · 100% in the county 06518 · Quinnipiac University · 20,126 people · 100% in the county 06519 · New Haven · 15,605 people · 100% in the county 06524 · 5,288 people · 100% in the county 06525 · 9,073 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 South Central Connecticut Planning Region

24 ZIP codes in South Central Connecticut Planning Region, CT, by number
ZIP code Main city Population Land in the county Residents in the county
06405 Branford Center 28,217 100% 28,217
06437 Guilford Center 22,067 100% 22,067
06443 Madison Center 17,657 100% 17,657
06450 Meriden 35,694 100% 35,694
06451 Meriden 24,851 99.8% ≈ 24,831
06460 Milford city (balance) 37,649 100% 37,649
06461 Milford city (balance) 15,035 100% 15,035
06471 — 7,140 100% 7,140
06472 Northford 6,363 100% 6,363
06473 North Haven 24,743 100% 24,743
06477 Orange 14,315 100% 14,315
06492 Wallingford Center 44,498 98% ≈ 43,966
06510 New Haven 4,584 100% 4,584
06511 New Haven 54,730 100% 54,730
06512 East Haven 28,830 100% 28,830
06513 New Haven 38,888 100% 38,888
06514 New Haven 26,803 100% 26,803
06515 New Haven 19,006 100% 19,006
06516 West Haven 55,351 100% 55,351
06517 — 14,221 100% 14,221
06518 Quinnipiac University 20,126 100% 20,126
06519 New Haven 15,605 100% 15,605
06524 — 5,288 100% 5,288
06525 — 9,073 100% 9,073

They also touch the county with under 1% of their land, so they aren’t counted: 06410.

ZIP codes shared with other counties

These 1 ZIP codes have part of their land in another county. The first figure is the share of their land in South Central Connecticut Planning Region; 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 New Haven (6), Meriden (2), Milford city (balance) (2), Branford Center (1), East Haven (1), and Guilford Center (1); 13 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 064 and 065.

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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