County ProfileCT
Southeastern Connecticut County
Population: - · 35 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
—
People
Median age
41.1
Housing
Total households
115,768
Income
Median household income
$86,586
Housing
Total housing units
126,425
Employment
Employment rate
58.5%
Education
Bachelor’s degree or higher
35.8%
Healthcare
Insured population
95.3%
County details
Local time 03:25:07(ET)| Name | Southeastern Connecticut |
|---|---|
| Total ZIP codes | 35total |
| ZIP codes (by type) | 31 Standard4 PO Box |
| Area code | 860, 959 |
| Timezone | Eastern Time (ET) |
| Coordinates | 41.4847688, -72.1016655 |
| Land area | 598.1 sq miles(1,549.2 km²) |
Map of Southeastern Connecticut county, Connecticut with ZIP codes
Cities and Communities in Southeastern Connecticut County
Compare the largest cities in Southeastern Connecticut County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Norwich | 40,125 | $65,024 | 1ZIPs |
| New London | 27,367 | $59,098 | 1ZIPs |
| Willimantic | 18,149 | $45,962 | 1ZIPs |
| Groton | 9,387 | $79,577 | 2ZIPs |
| Pawcatuck | 5,433 | $80,114 | 1ZIPs |
| Colchester | 4,700 | $86,760 | 1ZIPs |
| Mystic | 4,348 | $152,559 | 1ZIPs |
| Old Mystic | 3,493 | $130,903 | 1ZIPs |
| Jewett City | 3,328 | $55,530 | 1ZIPs |
| Niantic | 3,194 | $81,250 | 1ZIPs |
| Waterford | 3,074 | $73,156 | 1ZIPs |
| South Windham | 1,383 | $75,045 | 1ZIPs |
| Baltic | 1,186 | $68,958 | 1ZIPs |
| Gales Ferry | 1,159 | $80,735 | 1ZIPs |
| Stonington | 976 | $109,167 | 1ZIPs |
| Mashantucket | 457 | $125,000 | 1ZIPs |
| Bozrah | — | — | 1ZIPs |
| East Lyme | — | — | 1ZIPs |
| Gilman | — | — | 1ZIPs |
| Hanover | — | — | 1ZIPs |
| Lebanon | — | — | 1ZIPs |
| Ledyard | — | — | 1ZIPs |
| Montville | — | — | 1ZIPs |
| North Franklin | — | — | 1ZIPs |
| North Stonington | — | — | 1ZIPs |
| North Windham | — | — | 1ZIPs |
| Oakdale | — | — | 1ZIPs |
| Preston | — | — | 1ZIPs |
| Quaker Hill | — | — | 1ZIPs |
| Salem | — | — | 1ZIPs |
| Taftville | — | — | 1ZIPs |
| Uncasville | — | — | 1ZIPs |
| Windham | — | — | 1ZIPs |
| Yantic | — | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Southeastern Connecticut County
Review the most populated postal areas across Southeastern Connecticut County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 06226 | Willimantic | — | — |
| 06249 | Lebanon | — | — |
| 06254 | North Franklin | — | — |
| 06256 | North Windham | — | — |
| 06266 | South Windham | — | — |
| 06280 | Windham | — | — |
| 06320 | New London | — | — |
| 06330 | Baltic | — | — |
| 06333 | East Lyme | — | — |
| 06334 | Bozrah | — | — |
| 06335 | Gales Ferry | — | — |
| 06336 | Gilman | — | — |
| 06338 | Mashantucket | — | — |
| 06339 | Ledyard | — | — |
| 06340 | Groton | — | — |
| 06349 | Groton | — | — |
| 06350 | Hanover | — | — |
| 06351 | Jewett City | — | — |
| 06353 | Montville | — | — |
| 06355 | Mystic | — | — |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS