RANKING · 2024 ACS · 65 SHOWN OF 65

Most population lost, Connecticut cities

Connecticut cities that lost the most residents from the 2020 census to 2024, by raw count of people rather than percentage. This list covers the 65 cities in Connecticut that qualify, ranked against each other statewide. The median across all 65 is +104. Biggest climber in the top 100 since 2020: Hazardville, CT, up 48 places to #2.

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ConnecticutAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲45Glastonbury Center, CTCT7,266-1,193−1691%

02▲48Hazardville, CTCT6,022-848+204%

03▲34Rockville, CTCT7,072-848–

04▲36Storrs, CTCT15,207-772−36%

05▲12Ridgefield, CTCT6,970-626−174%

06▲10Thompsonville, CTCT7,927-587+76%

07▲36West Hartford, CTCT63,620-463−113%

08▲15Conning Towers-Nautilus Park, CTCT8,460-410−280%

09▲33Cheshire, CTCT6,172-327−1190%

10▲11Meriden, CTCT60,810-305−75%

11▲11West Haven, CTCT55,351-233−86%

12▲26Oakville, CTCT9,276-228+85%

13▼6Winsted, CTCT6,977-215−77%

14▲35Bethel, CTCT11,404-178−159%

15Daniels Farm, CTCT5,976-174–

16▼8Norwich, CTCT40,001-152−88%

17▼5East Hartford, CTCT50,918-127−86%

18▼16East Haven, CTCT27,806-117−106%

19▲17Simsbury Center, CTCT6,198-70+1650%

20▲4Wallingford Center, CTCT18,208-70−78%

21▲13Willimantic, CTCT18,096-53–

22▲17Wethersfield, CTCT27,250-48−108%

23▲4Windsor Locks, CTCT12,579-34−89%

24▲8Old Greenwich, CTCT6,936-26–

25▲23Kensington, CTCT9,9620−100%

26▼22Torrington, CTCT35,796+32−98%

27▲4Orange, CTCT14,315+35−91%

28▼13Putnam, CTCT7,120+55–

29▼28Hartford, CTCT121,981+73−100%

30▼2North Haven, CTCT24,336+83−89%

31▲14New Britain, CTCT76,286+88−102%

32▼29Groton, CTCT10,160+103−40%

33Northford, CTCT6,186+104–

34▲1Riverside, CTCT8,954+111–

35▼25Ansonia, CTCT19,216+115−24%

36▼18Portland, CTCT5,944+131−218%

37▼24Pawcatuck, CTCT5,577+144−22%

38▼32Derby, CTCT12,925+162−16%

39Noroton, CTCT5,539+222–

40▼10Southwood Acres, CTCT8,115+236−126%

41▼16Middletown, CTCT48,439+241−40%

42▼31New London, CTCT28,003+258−109%

43▼29Terryville, CTCT5,461+259−492%

44▼15Branford Center, CTCT6,305+279+494%

45▼36Naugatuck, CTCT32,230+281−23%

46▲6New Haven, CTCT138,774+326−105%

47▼28Sherwood Manor, CTCT5,706+334−150%

48▼28Newington, CTCT30,896+360+267%

49▲7Manchester, CTCT36,759+380–

50Staples, CTCT7,340+386–

51▼46Milford, CTCT51,215+465–

52▼1Waterbury, CTCT115,771+466−128%

53Bridgeport, CTCT152,273+499−123%

54Trumbull Center, CTCT10,264+518–

55▼22Bristol, CTCT62,341+629−209%

56Long Hill CDP (Greater Bridgeport County), CTCT8,681+642–

57▼31Cos Cob, CTCT7,546+673–

58New Canaan, CTCT6,896+676–

59▼4Danbury, CTCT89,033+745−92%

60Sandy Hook, CTCT9,863+749–

61▼17Greenwich, CTCT14,792+956–

62▼8Norwalk, CTCT94,508+1,003−78%

63▼16Shelton, CTCT42,880+1,020−62%

64▼23New Milford, CTCT8,188+1,028+20%

65▼8Stamford, CTCT139,535+1,674−81%

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES