Skip to content
ZIP codes

ZIP codes in Connecticut by county

Connecticut has 288 ZIP codes in its 9 counties. 11 of them cross a county line. Capitol Planning Region has the most, 72.

By the All Map Tools Team

ZIP codes
288
With 1% or more of their land in the state
Counties
9
7 with a page of their own below
Cross a county line
11
1% or more of their land in another county
Cross a state line
0
All of them lie inside the state
County with the most
72
Capitol Planning Region
Most populated ZIP
06902
73,392 people · Stamford

ZIP codes per county in Connecticut

Southeastern Connecticut Planning Region: 33 ZIP codes South Central Connecticut Planning Region: 24 ZIP codes Western Connecticut Planning Region: 35 ZIP codes Lower Connecticut River Valley Planning Region: 28 ZIP codes Naugatuck Valley Planning Region: 27 ZIP codes Capitol Planning Region: 72 ZIP codes Greater Bridgeport Planning Region: 14 ZIP codes Northwest Hills Planning Region: 36 ZIP codes Northeastern Connecticut Planning Region: 30 ZIP codes
  • 14–27
  • 28–30
  • 31–35
  • 36–72
Open in the interactive tool

Counties and their ZIP codes

County Population (2025) ZIP codes Shared
Capitol Planning Region 994,115 72 2
Greater Bridgeport Planning Region 337,697 14 0
Lower Connecticut River Valley Planning Region 177,311 28 2
Naugatuck Valley Planning Region 463,349 27 2
Northeastern Connecticut Planning Region 98,096 30 4
Northwest Hills Planning Region 114,690 36 3
South Central Connecticut Planning Region 578,741 24 1
Southeastern Connecticut Planning Region 284,015 33 6
Western Connecticut Planning Region 640,482 35 2

Every ZIP code in Connecticut, by county

A ZIP code that crosses a county line appears in each county it has 1% or more of its land in.

Capitol Planning Region (72)
06001, 06002, 06016, 06019, 06020, 06022, 06023, 06026, 06029, 06032, 06033, 06035, 06037, 06040, 06042, 06043, 06051, 06052, 06053, 06059, 06060, 06062, 06066, 06067, 06070, 06071, 06072, 06073, 06074, 06076, 06078, 06080, 06081, 06082, 06084, 06085, 06088, 06089, 06090, 06092, 06093, 06095, 06096, 06103, 06105, 06106, 06107, 06108, 06109, 06110, 06111, 06112, 06114, 06117, 06118, 06119, 06120, 06226, 06231, 06232, 06237, 06238, 06248, 06250, 06268, 06269, 06279, 06444, 06447, 06467, 06479, 06489
Greater Bridgeport Planning Region (14)
06468, 06604, 06605, 06606, 06607, 06608, 06610, 06611, 06612, 06614, 06615, 06824, 06825, 06890
Lower Connecticut River Valley Planning Region (28)
06371, 06376, 06409, 06412, 06413, 06414, 06415, 06416, 06417, 06419, 06420, 06422, 06423, 06424, 06426, 06438, 06439, 06441, 06442, 06455, 06456, 06457, 06459, 06469, 06475, 06480, 06481, 06498
Naugatuck Valley Planning Region (27)
06010, 06401, 06403, 06410, 06418, 06478, 06483, 06484, 06488, 06492, 06702, 06704, 06705, 06706, 06708, 06710, 06712, 06716, 06751, 06762, 06770, 06779, 06782, 06786, 06787, 06795, 06798
Northeastern Connecticut Planning Region (30)
06076, 06234, 06235, 06239, 06241, 06242, 06243, 06247, 06255, 06258, 06259, 06260, 06262, 06263, 06264, 06277, 06278, 06280, 06281, 06282, 06330, 06331, 06332, 06351, 06354, 06373, 06374, 06377, 06384, 06387
Northwest Hills Planning Region (36)
06013, 06018, 06021, 06024, 06027, 06031, 06039, 06057, 06058, 06061, 06063, 06065, 06068, 06069, 06079, 06091, 06098, 06750, 06752, 06753, 06754, 06756, 06757, 06758, 06759, 06763, 06777, 06778, 06783, 06785, 06787, 06790, 06791, 06793, 06794, 06796
South Central Connecticut Planning Region (24)
06405, 06437, 06443, 06450, 06451, 06460, 06461, 06471, 06472, 06473, 06477, 06492, 06510, 06511, 06512, 06513, 06514, 06515, 06516, 06517, 06518, 06519, 06524, 06525
Southeastern Connecticut Planning Region (33)
06226, 06249, 06254, 06256, 06266, 06280, 06320, 06330, 06333, 06334, 06335, 06336, 06338, 06339, 06340, 06350, 06351, 06353, 06355, 06357, 06359, 06360, 06365, 06370, 06375, 06378, 06379, 06380, 06382, 06385, 06389, 06415, 06420
Western Connecticut Planning Region (35)
06470, 06482, 06752, 06755, 06776, 06784, 06794, 06801, 06804, 06807, 06810, 06811, 06812, 06820, 06830, 06831, 06840, 06850, 06851, 06853, 06854, 06855, 06870, 06877, 06878, 06880, 06883, 06896, 06897, 06901, 06902, 06903, 06905, 06906, 06907

Neighboring states

Tools for Connecticut

ZIP codes by county or city Any county or city in Connecticut on an interactive map, with CSV US county map Its counties shaded by population, income or your own data Elevation and places of Connecticut Its capital, its cities and its highest point, with their elevation

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.

Spotted a mistake? Let us know