RANKING · 2020 CENSUS · 57 SHOWN OF 57

Fastest shrinking, Connecticut cities

Connecticut cities with the steepest population decline since the prior decennial census. This list covers the 57 cities in Connecticut that qualify, ranked against each other statewide.

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SAME RANKING BYCounties States Metros

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Groton, CTCT10,160-9.6%−648%

02Winsted, CTCT6,977-6.7%−40%

03East Haven, CTCT27,806-4.6%−158%

04Derby, CTCT12,925-4.5%−384%

05Terryville, CTCT5,461-3.4%+182%

06Pawcatuck, CTCT5,577-3.4%−197%

07Hartford, CTCT121,981-3.0%−77%

08Torrington, CTCT35,796-2.4%−153%

09Putnam, CTCT7,120-2.1%–

10Ansonia, CTCT19,216-1.7%−310%

11Milford, CTCT51,215-1.4%–

12Naugatuck, CTCT32,230-1.1%−191%

13New London, CTCT28,003-0.9%−91%

14Norwich, CTCT40,001-0.9%−73%

15Portland, CTCT5,944-0.8%−57%

16Thompsonville, CTCT7,927-0.7%−81%

17Sherwood Manor, CTCT5,706-0.7%−93%

18Ridgefield, CTCT6,970-0.6%−105%

19East Hartford, CTCT50,918-0.4%−77%

20Newington, CTCT30,896-0.1%−125%

21Meriden, CTCT60,810-0.0%−99%

22West Haven, CTCT55,351+0.0%−101%

23Middletown, CTCT48,439+0.1%−85%

24Wallingford Center, CTCT18,208+0.4%−121%

25Conning Towers-Nautilus Park, CTCT8,460+0.4%−82%

26Bristol, CTCT62,341+0.6%−162%

27North Haven, CTCT24,336+0.7%−81%

28Windsor Locks, CTCT12,579+0.9%−136%

29New Britain, CTCT76,286+1.3%−124%

30West Hartford, CTCT63,620+1.3%−78%

31Cos Cob, CTCT7,546+1.5%–

32Orange, CTCT14,315+2.3%−26%

33Willimantic, CTCT18,096+2.3%–

34Wethersfield, CTCT27,250+2.4%−2%

35Southwood Acres, CTCT8,115+2.9%−129%

36Bridgeport, CTCT152,273+3.1%−302%

37New Haven, CTCT138,774+3.3%−162%

38Shelton, CTCT42,880+3.3%−56%

39Branford Center, CTCT6,305+3.6%+331%

40Waterbury, CTCT115,771+3.7%−336%

41Storrs, CTCT15,207+4.1%−142%

42Oakville, CTCT9,276+5.1%−459%

43Riverside, CTCT8,954+5.1%–

44Old Greenwich, CTCT6,936+5.3%–

45Rockville, CTCT7,072+6.0%–

46Norwalk, CTCT94,508+6.5%+11%

47Greenwich, CTCT14,792+6.9%–

48Danbury, CTCT89,033+7.0%−51%

49Simsbury Center, CTCT6,198+7.4%−10476%

50New Milford, CTCT8,188+9.8%−34%

51Stamford, CTCT139,535+10.5%+25%

52Cheshire, CTCT6,172+12.3%+2266%

53Glastonbury Center, CTCT7,266+14.5%+1270%

54Kensington, CTCT9,962+17.8%+528%

55Manchester, CTCT36,759+19.0%–

56Bethel, CTCT11,404+21.3%+523%

57Hazardville, CTCT6,022+49.4%−1017%

SHOWING 1–57 OF 57

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES