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.

Flip the list · Fastest growing, US cities →

ConnecticutAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Groton, CTCT10,160-9.6%−11.4 pts

02Winsted, CTCT6,977-6.7%+4.6 pts

03East Haven, CTCT27,806-4.6%−12.4 pts

04Derby, CTCT12,925-4.5%−6.0 pts

05Terryville, CTCT5,461-3.4%−2.2 pts

06Pawcatuck, CTCT5,577-3.4%−6.9 pts

07Hartford, CTCT121,981-3.0%+10.0 pts

08Torrington, CTCT35,796-2.4%−6.9 pts

09Putnam, CTCT7,120-2.1%–

10Ansonia, CTCT19,216-1.7%−2.5 pts

11Milford, CTCT51,215-1.4%–

12Naugatuck, CTCT32,230-1.1%−2.3 pts

13New London, CTCT28,003-0.9%+9.1 pts

14Norwich, CTCT40,001-0.9%+2.5 pts

15Portland, CTCT5,944-0.8%+1.1 pts

16Thompsonville, CTCT7,927-0.7%+3.2 pts

17Sherwood Manor, CTCT5,706-0.7%+9.8 pts

18Ridgefield, CTCT6,970-0.6%−14.0 pts

19East Hartford, CTCT50,918-0.4%+1.3 pts

20Newington, CTCT30,896-0.1%−0.4 pts

21Meriden, CTCT60,810-0.0%+2.0 pts

22West Haven, CTCT55,351+0.0%+3.1 pts

23Middletown, CTCT48,439+0.1%−0.8 pts

24Wallingford Center, CTCT18,208+0.4%+2.2 pts

25Conning Towers-Nautilus Park, CTCT8,460+0.4%−1.9 pts

26Bristol, CTCT62,341+0.6%+1.5 pts

27North Haven, CTCT24,336+0.7%−2.9 pts

28Windsor Locks, CTCT12,579+0.9%+3.5 pts

29New Britain, CTCT76,286+1.3%+6.5 pts

30West Hartford, CTCT63,620+1.3%−4.5 pts

31Cos Cob, CTCT7,546+1.5%–

32Orange, CTCT14,315+2.3%−0.8 pts

33Willimantic, CTCT18,096+2.3%–

34Wethersfield, CTCT27,250+2.4%−0.1 pts

35Southwood Acres, CTCT8,115+2.9%+12.9 pts

36Bridgeport, CTCT152,273+3.1%+4.6 pts

37New Haven, CTCT138,774+3.3%+8.5 pts

38Shelton, CTCT42,880+3.3%−4.3 pts

39Branford Center, CTCT6,305+3.6%+2.7 pts

40Waterbury, CTCT115,771+3.7%+5.2 pts

41Storrs, CTCT15,207+4.1%+14.0 pts

42Oakville, CTCT9,276+5.1%+6.5 pts

43Riverside, CTCT8,954+5.1%–

44Old Greenwich, CTCT6,936+5.3%–

45Rockville, CTCT7,072+6.0%–

46Norwalk, CTCT94,508+6.5%+0.6 pts

47Greenwich, CTCT14,792+6.9%–

48Danbury, CTCT89,033+7.0%−7.2 pts

49Simsbury Center, CTCT6,198+7.4%+7.5 pts

50New Milford, CTCT8,188+9.8%−5.1 pts

51Stamford, CTCT139,535+10.5%+2.1 pts

52Cheshire, CTCT6,172+12.3%+11.8 pts

53Glastonbury Center, CTCT7,266+14.5%+13.5 pts

54Kensington, CTCT9,962+17.8%+14.9 pts

55Manchester, CTCT36,759+19.0%–

56Bethel, CTCT11,404+21.3%+17.9 pts

57Hazardville, CTCT6,022+49.4%+54.8 pts

SHOWING 1–57 OF 57

Download CSV (full list, 57 rows)

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS