Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/CT/COUNTY/SOUTHEASTERN-CONNECTICUT-PLANNING-REGION

Southeastern Connecticut Planning Region, CT ZIP codes

There are 36 ZIP codes in Southeastern Connecticut Planning Region, CT, in 35 towns, from 06226 to 06474. The largest are 06360 (Norwich), 06340 (Groton) and 06320 (New London).

Connecticut abolished county government in 1960, and since 2022 the Census Bureau counts nine planning regions in place of its eight counties. ZIP codes are still placed by the old counties, so each one here is also listed under its county. Its ZIP codes are in New London County (32) and Windham County (4).

ZIP codes
36
Towns
35
County FIPS
09180
Population
279,971
Median household income
$86,586
Land area
598 sq mi

Southeastern Connecticut Planning Region ZIP codes by town

Each ZIP code is listed under the region its central point lies in and the town the Postal Service names it for.

Map of Southeastern Connecticut Planning Region ZIP codes

062260624906254062560626606280063200633006335063360633806339063400634906350063510635306355063570635906360063650637006372063750637806379063800638206383063850638806389064150642006474

The ZIP codes of Southeastern Connecticut Planning Region, 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.

Southeastern Connecticut Planning Region in numbers

About 279,971 people live in Southeastern Connecticut Planning Region, in 115,768 households. The median household income is $86,586 a year, 10% below the Connecticut median of $95,781 (US: $80,734). The median owner-occupied home is valued at $323,400 (12% below the Connecticut median), and median gross rent is $1,365 a month. The median age is 41.1; 35.8% of adults 25 and over hold a bachelor's degree or higher (42.5% across Connecticut); the average commute takes 24 minutes.

Population279,971Southeastern Connecticut Planning Region279,971
Households115,768Southeastern Connecticut Planning Region115,768
Median age41.1Southeastern Connecticut Planning Region41.1Connecticut41.1US 38.9
Median household income$86,586Southeastern Connecticut Planning Region$86,586Connecticut$95,781US $80,734
Median home value$323,400Southeastern Connecticut Planning Region$323,400Connecticut$366,900US $332,700
Median gross rent$1,365Southeastern Connecticut Planning Region$1,365Connecticut$1,488US $1,413
Bachelor's degree or higher35.8%Southeastern Connecticut Planning Region35.8%Connecticut42.5%US 35.7%
Mean commute23.9 minSoutheastern Connecticut Planning Region23.9 minConnecticut26.5 minUS 26.4 min
Population density468 / sq miSoutheastern Connecticut Planning Region468 / 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.

Not sure you are in Southeastern Connecticut Planning Region? What county am I in? answers from your location, near a county line included.

Every ZIP code in Southeastern Connecticut Planning Region, with figures

ZIP codes in Southeastern Connecticut Planning Region
ZIP City Type Population Median income Median home
06226 Willimantic , CT Standard 19,344 $47,162 $190,000
06249 Lebanon , CT Standard 7,116 $109,135 $345,900
06254 North Franklin , CT Standard 2,004 $105,000 $326,200
06256 North Windham , CT Standard 1,704 $80,333 $187,700
06266 South Windham , CT Standard 222 — $232,800
06280 Windham , CT Standard 3,110 $76,577 $250,500
06320 New London , CT Standard 27,703 $59,170 $253,300
06330 Baltic , CT Standard 3,327 $98,698 $279,400
06335 Gales Ferry , CT Standard 6,307 $118,116 $322,400
06336 Gilman , CT Standard 44 $133,750 —
06338 Mashantucket , CT Standard 27 $137,500 $433,300
06339 Ledyard , CT Standard 9,113 $106,403 $330,500
06340 Groton , CT Standard 29,863 $81,792 $294,700
06349 Groton , CT No street area — — —
06350 Hanover , CT Standard 121 $40,950 —
06351 Jewett City , CT Standard 15,760 $82,976 $294,400
06353 Montville , CT Standard 439 — —
06355 Mystic , CT Standard 12,173 $137,425 $453,400
06357 Niantic , CT Standard 11,332 $93,026 $397,300
06359 North Stonington , CT Standard 5,160 $123,938 $397,100
06360 Norwich , CT Standard 37,216 $65,539 $245,700
06365 Preston , CT Standard 4,807 $117,045 $361,400
06370 Oakdale , CT Standard 7,327 $105,700 $332,500
06372 Old Mystic , CT No street area — — —
06375 Quaker Hill , CT Standard 3,670 $111,833 $326,000
06378 Stonington , CT Standard 5,555 $135,714 $593,400
06379 Pawcatuck , CT Standard 9,017 $95,066 $406,100
06380 Taftville , CT Standard 2,757 $63,452 $194,300
06382 Uncasville , CT Standard 10,143 $89,635 $267,800
06383 Versailles , CT No street area — — —
06385 Waterford , CT Standard 15,966 $100,484 $365,400
06388 West Mystic , CT No street area — — —
06389 Yantic , CT Standard 0 — —
06415 Colchester , CT Standard 16,038 $123,256 $366,300
06420 Salem , CT Standard 4,368 $123,425 $405,800
06474 North Westchester , CT No street area — — —

Cite this page

zipcodes.pro. “Southeastern Connecticut Planning Region ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ct/county/southeastern-connecticut-planning-region

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