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What are the fastest-growing counties in Connecticut?

Greater Bridgeport Planning Region (+4.1%), Western Connecticut Planning Region (+3.5%) and Naugatuck Valley Planning Region (+3.2%) grew fastest in Connecticut between 2020 and 2025.

Connecticut as a whole grew 3.0% between 2020 and 2025, to 3,688,496 residents.

Data as of 2025 · updated

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All 9 Connecticut counties ranked

Connecticut counties by population growth
RankCountyResidents 2025Change 2020–25Net migration per 1,000, 2025New homes per 1,000, 2025
1Greater Bridgeport Planning Region337,697+4.1%−6.12.2
2Western Connecticut Planning Region640,482+3.5%−5.74.3
3Naugatuck Valley Planning Region463,349+3.2%0.41.1
4Capitol Planning Region994,115+3.1%−0.11.2
5Northeastern Connecticut Planning Region98,096+3.0%4.51.9
6South Central Connecticut Planning Region578,741+2.5%−2.91.8
7Lower Connecticut River Valley Planning Region177,311+2.3%1.12.0
8Northwest Hills Planning Region114,690+2.2%3.21.2
9Southeastern Connecticut Planning Region284,015+2.0%1.31.5

Ranked by the change in Census Bureau population estimates, 2020–2025.

Statewide totals

Metro areas

Fastest-growing metro areas in the U.S.

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Questions

Is Connecticut growing?

Connecticut as a whole grew 3.0% between 2020 and 2025, to 3,688,496 residents. Statewide figures add up its counties.

What is the fastest-growing county in Connecticut?

Greater Bridgeport Planning Region, which grew 4.1% between 2020 and 2025 to 337,697 residents (Census Bureau population estimates). Western Connecticut Planning Region (+3.5%) and Naugatuck Valley Planning Region (+3.2%) came next.

Which Connecticut counties are losing population?

None of the 9 ranked counties lost residents between 2020 and 2025.

Where are people moving in Connecticut?

For their size, Northeastern Connecticut Planning Region (4.5 per 1,000 residents), Northwest Hills Planning Region (3.2 per 1,000 residents) and Southeastern Connecticut Planning Region (1.3 per 1,000 residents) drew the most net domestic migration (people moving in from other U.S. counties minus people moving out) in 2025.

Fastest-growing counties in other states

Across the U.S.

Sources and method

Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.