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. The median across all 62 is -790. Biggest climber in the top 100 since 2020: Oswego County, NY, up 43 places to #15.

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New YorkAll states All rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲7Suffolk County, NYNY1,546,090+20,170−79%

02▲9Rockland County, NYNY357,397+19,068−10%

03▲6Orange County, NYNY417,669+16,359−51%

04▲2Westchester County, NYNY1,015,743+11,286−77%

05▲9Albany County, NYNY321,225+6,377+224%

06▲6Saratoga County, NYNY241,343+5,834−70%

07▲3Richmond County, NYNY501,290+5,543−91%

08▲24Dutchess County, NYNY300,708+4,797−77%

09▲9Schenectady County, NYNY162,581+4,520−266%

10▼5Nassau County, NYNY1,398,939+3,165−93%

11▲42Otsego County, NYNY60,589+2,065+78%

12▲8Sullivan County, NYNY80,586+1,962−58%

13▲14Ulster County, NYNY183,330+1,479−88%

14▲24Putnam County, NYNY99,028+1,360−88%

15▲43Oswego County, NYNY118,569+1,044+72%

16Ontario County, NYNY113,130+672−87%

17▲11Montgomery County, NYNY50,046+514−123%

18▲29Schoharie County, NYNY30,176+462−267%

19▲23Allegany County, NYNY46,800+344−163%

20▲14Genesee County, NYNY58,416+28−91%

21▲31Delaware County, NYNY44,305-3−100%

22▲19Wayne County, NYNY91,250-33−101%

23▼1Hamilton County, NYNY5,006-101−201%

24▲1Lewis County, NYNY26,479-103−170%

25▲1Yates County, NYNY24,547-227−113%

26▲25Livingston County, NYNY61,438-396−120%

27▲17Orleans County, NYNY39,825-518−122%

28▼9Rensselaer County, NYNY160,510-620−67%

29Greene County, NYNY47,238-693−120%

30▼7Warren County, NYNY65,020-717−118%

31▲2Wyoming County, NYNY39,741-790−186%

32▲29Madison County, NYNY67,120-896−379%

33▲24Herkimer County, NYNY59,219-920−33%

34▼4Seneca County, NYNY32,883-931+173%

35▲2Essex County, NYNY36,438-943−156%

36▲7Cortland County, NYNY45,850-959+163%

37▼13Schuyler County, NYNY16,924-974−273%

38▲7Tioga County, NYNY47,453-1,002+81%

39▲17Franklin County, NYNY46,500-1,055−123%

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

41▼10Columbia County, NYNY60,168-1,402−1352%

42▲6Chenango County, NYNY45,715-1,505+310%

43▲6Cattaraugus County, NYNY75,390-1,652+492%

44▼27Tompkins County, NYNY104,047-1,693−170%

45▼5Clinton County, NYNY78,138-1,705−72%

46▲14Steuben County, NYNY91,855-1,729+378%

47▲7Cayuga County, NYNY74,365-1,883+438%

48▼13Washington County, NYNY59,353-1,949−214%

49▼13Broome County, NYNY195,736-2,947−75%

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

51▲11Chautauqua County, NYNY124,126-3,531+65%

52▲7Chemung County, NYNY80,415-3,733−10%

53▲2Niagara County, NYNY208,912-3,754+313%

54▼33Jefferson County, NYNY111,540-5,181−752%

55▼9Oneida County, NYNY226,392-5,733−63%

56▼49Erie County, NYNY946,741-7,495−59%

57▼44Monroe County, NYNY750,506-8,937−142%

58▼43Onondaga County, NYNY466,584-9,932−7%

59▼56New York County, NYNY1,664,862-29,389−159%

60▼58Queens County, NYNY2,358,182-47,282−117%

61▼57Bronx County, NYNY1,406,332-66,322−151%

62▼61Kings County, NYNY2,653,963-82,111−150%

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES