County ProfileCT
Lower Connecticut River Valley County
Population: - · 26 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
—
People
Median age
45.9
Housing
Total households
74,068
Income
Median household income
$104,428
Housing
Total housing units
82,963
Employment
Employment rate
62.4%
Education
Bachelor’s degree or higher
46%
Healthcare
Insured population
96.7%
County details
Local time 03:22:10(ET)| Name | Lower Connecticut River Valley |
|---|---|
| Total ZIP codes | 26total |
| ZIP codes (by type) | 21 Standard4 PO Box1 Unique |
| Area code | 860, 959 |
| Timezone | Eastern Time (ET) |
| Coordinates | 41.4203071, -72.4935251 |
| Land area | 424.1 sq miles(1,098.5 km²) |
Map of Lower Connecticut River Valley county, Connecticut with ZIP codes
Cities and Communities in Lower Connecticut River Valley County
Compare the largest cities in Lower Connecticut River Valley 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 |
|---|---|---|---|
| Middletown | 47,717 | $79,438 | 2ZIPs |
| Portland | 5,813 | $89,401 | 1ZIPs |
| Durham | 3,771 | $152,396 | 1ZIPs |
| Clinton | 3,441 | $102,750 | 1ZIPs |
| East Hampton | 2,960 | $123,929 | 1ZIPs |
| Essex | 2,583 | $102,885 | 1ZIPs |
| Higganum | 2,089 | $127,759 | 1ZIPs |
| Moodus | 1,982 | $103,457 | 1ZIPs |
| Centerbrook | — | — | 1ZIPs |
| Chester | — | — | 1ZIPs |
| Cobalt | — | — | 1ZIPs |
| Cromwell | — | — | 1ZIPs |
| Deep River | — | — | 1ZIPs |
| East Haddam | — | — | 1ZIPs |
| Haddam | — | — | 1ZIPs |
| Hadlyme | — | — | 1ZIPs |
| Ivoryton | — | — | 1ZIPs |
| Killingworth | — | — | 1ZIPs |
| Middle Haddam | — | — | 1ZIPs |
| Middlefield | — | — | 1ZIPs |
| Old Lyme | — | — | 1ZIPs |
| Old Saybrook | — | — | 1ZIPs |
| Rockfall | — | — | 1ZIPs |
| South Lyme | — | — | 1ZIPs |
| Westbrook | — | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Lower Connecticut River Valley County
Review the most populated postal areas across Lower Connecticut River Valley County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 06371 | Old Lyme | — | — |
| 06376 | South Lyme | — | — |
| 06409 | Centerbrook | — | — |
| 06412 | Chester | — | — |
| 06413 | Clinton | — | — |
| 06414 | Cobalt | — | — |
| 06416 | Cromwell | — | — |
| 06417 | Deep River | — | — |
| 06419 | Killingworth | — | — |
| 06422 | Durham | — | — |
| 06423 | East Haddam | — | — |
| 06424 | East Hampton | — | — |
| 06426 | Essex | — | — |
| 06438 | Haddam | — | — |
| 06439 | Hadlyme | — | — |
| 06441 | Higganum | — | — |
| 06442 | Ivoryton | — | — |
| 06455 | Middlefield | — | — |
| 06456 | Middle Haddam | — | — |
| 06457 | Middletown | — | — |
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