RANKING · 2020 CENSUS · 57 SHOWN OF 57

Fastest shrinking, Connecticut cities · 2020

Connecticut cities with the steepest population decline from the 2010 census to 2020. 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 2024

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 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS