RANKING · 2025 ESTIMATES · 62 SHOWN OF 62

Most population gained, New York counties

New York counties that added the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 62 counties in New York that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Suffolk County, NYNY1,546,090+20,170−79%

02Rockland County, NYNY357,397+19,068−10%

03Orange County, NYNY417,669+16,359−51%

04Westchester County, NYNY1,015,743+11,286−77%

05Albany County, NYNY321,225+6,377+224%

06Saratoga County, NYNY241,343+5,834−70%

07Richmond County, NYNY501,290+5,543−91%

08Dutchess County, NYNY300,708+4,797−77%

09Schenectady County, NYNY162,581+4,520−266%

10Nassau County, NYNY1,398,939+3,165−93%

11Otsego County, NYNY60,589+2,065+78%

12Sullivan County, NYNY80,586+1,962−58%

13Ulster County, NYNY183,330+1,479−88%

14Putnam County, NYNY99,028+1,360−88%

15Oswego County, NYNY118,569+1,044+72%

16Ontario County, NYNY113,130+672−87%

17Montgomery County, NYNY50,046+514−123%

18Schoharie County, NYNY30,176+462−267%

19Allegany County, NYNY46,800+344−163%

20Genesee County, NYNY58,416+28−91%

21Delaware County, NYNY44,305-3−100%

22Wayne County, NYNY91,250-33−101%

23Hamilton County, NYNY5,006-101−201%

24Lewis County, NYNY26,479-103−170%

25Yates County, NYNY24,547-227−113%

26Livingston County, NYNY61,438-396−120%

27Orleans County, NYNY39,825-518−122%

28Rensselaer County, NYNY160,510-620−67%

29Greene County, NYNY47,238-693−120%

30Warren County, NYNY65,020-717−118%

31Wyoming County, NYNY39,741-790−186%

32Madison County, NYNY67,120-896−379%

33Herkimer County, NYNY59,219-920−33%

34Seneca County, NYNY32,883-931+173%

35Essex County, NYNY36,438-943−156%

36Cortland County, NYNY45,850-959+163%

37Schuyler County, NYNY16,924-974−273%

38Tioga County, NYNY47,453-1,002+81%

39Franklin County, NYNY46,500-1,055−123%

40Fulton County, NYNY52,216-1,108−226%

41Columbia County, NYNY60,168-1,402−1352%

42Chenango County, NYNY45,715-1,505+310%

43Cattaraugus County, NYNY75,390-1,652+492%

44Tompkins County, NYNY104,047-1,693−170%

45Clinton County, NYNY78,138-1,705−72%

46Steuben County, NYNY91,855-1,729+378%

47Cayuga County, NYNY74,365-1,883+438%

48Washington County, NYNY59,353-1,949−214%

49Broome County, NYNY195,736-2,947−75%

50St. Lawrence County, NYNY105,488-3,017+6916%

51Chautauqua County, NYNY124,126-3,531+65%

52Chemung County, NYNY80,415-3,733−10%

53Niagara County, NYNY208,912-3,754+313%

54Jefferson County, NYNY111,540-5,181−752%

55Oneida County, NYNY226,392-5,733−63%

56Erie County, NYNY946,741-7,495−59%

57Monroe County, NYNY750,506-8,937−142%

58Onondaga County, NYNY466,584-9,932−7%

59New York County, NYNY1,664,862-29,389−159%

60Queens County, NYNY2,358,182-47,282−117%

61Bronx County, NYNY1,406,332-66,322−151%

62Kings County, NYNY2,653,963-82,111−150%

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES