Population in Connecticut by County

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

Connecticut

3,624,508

Counties

9

Highest

Capitol

977,290

Lowest

Northeastern Connecticut

96,312

All Connecticut counties, ranked

# Counties Population
1 Capitol 977,290
2 Western Connecticut 627,071
3 South Central Connecticut 570,598
4 Naugatuck Valley 454,969
5 Greater Bridgeport 329,259
6 Southeastern Connecticut 279,971
7 Lower Connecticut River Valley 175,822
8 Northwest Hills 113,216
9 Northeastern Connecticut 96,312

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source
U.S. Census Bureau
Citation
U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage
ACS 5-year 2020-2024
License
Public domain (U.S. Census Bureau)
Unit
people
Available at
State · County · ZIP code
Territory roll-up
Summed across each territory
Last loaded
November 2026

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Population by county in other states

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US Population nationwide