RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Largest by population, Connecticut cities

The most populous Connecticut cities as of the 2025 population estimates. This list covers the 21 cities in Connecticut that qualify, ranked against each other statewide. The median across all 21 is 55,351. Biggest climber in the top 100 since 2020: Groton, CT, up 17 places to #21.

ConnecticutAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Bridgeport, CTCT152,273+9%

02Stamford, CTCT139,535+19%

03New Haven, CTCT138,774+12%

04Hartford, CTCT121,9810%

05Waterbury, CTCT115,771+8%

06Norwalk, CTCT94,508+14%

07Danbury, CTCT89,033+19%

08New Britain, CTCT76,286+7%

09▲2Bristol, CTCT62,341+4%

10Meriden, CTCT60,810+4%

11▲1West Haven, CTCT55,351+6%

12▲2Milford, CTCT51,215+1%

13▲2Middletown, CTCT48,439+12%

14▲2Shelton, CTCT42,880+13%

15▲2Norwich, CTCT40,001+11%

16▲3Torrington, CTCT35,796+2%

17▲3Naugatuck, CTCT32,230+4%

18▲5New London, CTCT28,003+9%

19▲7Ansonia, CTCT19,216+4%

20▲13Derby, CTCT12,925+4%

21▲17Groton, CTCT10,160+1%

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES