RANKING · 2024 ACS · 65 SHOWN OF 65

Most population gained, Connecticut cities

Connecticut cities that added 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.

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ConnecticutAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Stamford, CTCT139,535+1,674−81%

02New Milford, CTCT8,188+1,028+20%

03Shelton, CTCT42,880+1,020−62%

04Norwalk, CTCT94,508+1,003−78%

05Greenwich, CTCT14,792+956–

06Sandy Hook, CTCT9,863+749–

07Danbury, CTCT89,033+745−92%

08New Canaan, CTCT6,896+676–

09Cos Cob, CTCT7,546+673–

10Long Hill CDP (Greater Bridgeport County), CTCT8,681+642–

11Bristol, CTCT62,341+629−209%

12Trumbull Center, CTCT10,264+518–

13Bridgeport, CTCT152,273+499−123%

14Waterbury, CTCT115,771+466−128%

15Milford, CTCT51,215+465–

16Staples, CTCT7,340+386–

17Manchester, CTCT36,759+380–

18Newington, CTCT30,896+360+267%

19Sherwood Manor, CTCT5,706+334−150%

20New Haven, CTCT138,774+326−105%

21Naugatuck, CTCT32,230+281−23%

22Branford Center, CTCT6,305+279+494%

23Terryville, CTCT5,461+259−492%

24New London, CTCT28,003+258−109%

25Middletown, CTCT48,439+241−40%

26Southwood Acres, CTCT8,115+236−126%

27Noroton, CTCT5,539+222–

28Derby, CTCT12,925+162−16%

29Pawcatuck, CTCT5,577+144−22%

30Portland, CTCT5,944+131−218%

31Ansonia, CTCT19,216+115−24%

32Riverside, CTCT8,954+111–

33Northford, CTCT6,186+104–

34Groton, CTCT10,160+103−40%

35New Britain, CTCT76,286+88−102%

36North Haven, CTCT24,336+83−89%

37Hartford, CTCT121,981+73−100%

38Putnam, CTCT7,120+55–

39Orange, CTCT14,315+35−91%

40Torrington, CTCT35,796+32−98%

41Kensington, CTCT9,9620−100%

42Old Greenwich, CTCT6,936-26–

43Windsor Locks, CTCT12,579-34−89%

44Wethersfield, CTCT27,250-48−108%

45Willimantic, CTCT18,096-53–

46Simsbury Center, CTCT6,198-70+1650%

47Wallingford Center, CTCT18,208-70−78%

48East Haven, CTCT27,806-117−106%

49East Hartford, CTCT50,918-127−86%

50Norwich, CTCT40,001-152−88%

51Daniels Farm, CTCT5,976-174–

52Bethel, CTCT11,404-178−159%

53Winsted, CTCT6,977-215−77%

54Oakville, CTCT9,276-228+85%

55West Haven, CTCT55,351-233−86%

56Meriden, CTCT60,810-305−75%

57Cheshire, CTCT6,172-327−1190%

58Conning Towers-Nautilus Park, CTCT8,460-410−280%

59West Hartford, CTCT63,620-463−113%

60Thompsonville, CTCT7,927-587+76%

61Ridgefield, CTCT6,970-626−174%

62Storrs, CTCT15,207-772−36%

63Hazardville, CTCT6,022-848+204%

64Rockville, CTCT7,072-848–

65Glastonbury Center, CTCT7,266-1,193−1691%

SHOWING 1–65 OF 65

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES