RANKING · 2010 CENSUS · 62 SHOWN OF 62

Most population lost, New York counties · 2010

New York counties that lost the most residents from the 2000 census to 2010, 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

01Erie County, NYNY946,741-31,225+71%

02Chautauqua County, NYNY124,126-4,845+126%

03Cattaraugus County, NYNY75,390-3,638+1204%

04Niagara County, NYNY208,912-3,377+271%

05Chemung County, NYNY80,415-2,240−46%

06Cayuga County, NYNY74,365-1,937+453%

07Orleans County, NYNY39,825-1,288−155%

08Wyoming County, NYNY39,741-1,269−238%

09Allegany County, NYNY46,800-981+81%

10Chenango County, NYNY45,715-924+152%

11Schuyler County, NYNY16,924-881−257%

12Tioga County, NYNY47,453-659+19%

13Oneida County, NYNY226,392-591−96%

14Hamilton County, NYNY5,006-543−643%

15Genesee County, NYNY58,416-291−194%

16Oswego County, NYNY118,569-268−144%

17Delaware County, NYNY44,305-75−109%

18Columbia County, NYNY60,168+2−98%

19Wayne County, NYNY91,250+7−100%

20St. Lawrence County, NYNY105,488+13−130%

21Broome County, NYNY195,736+64−101%

22Herkimer County, NYNY59,219+92−107%

23Lewis County, NYNY26,479+143−3%

24Steuben County, NYNY91,855+264−173%

25Fulton County, NYNY52,216+458−48%

26Franklin County, NYNY46,500+465−90%

27Montgomery County, NYNY50,046+511−122%

28Essex County, NYNY36,438+519−69%

29Otsego County, NYNY60,589+583−50%

30Yates County, NYNY24,547+727−60%

31Cortland County, NYNY45,850+737−302%

32Greene County, NYNY47,238+1,026−70%

33Livingston County, NYNY61,438+1,065−46%

34Schoharie County, NYNY30,176+1,167−521%

35Queens County, NYNY2,358,182+1,343−100%

36Seneca County, NYNY32,883+1,909−660%

37Washington County, NYNY59,353+2,174+27%

38Clinton County, NYNY78,138+2,234−137%

39Warren County, NYNY65,020+2,404−41%

40Sullivan County, NYNY80,586+3,581−24%

41Putnam County, NYNY99,028+3,965−66%

42Madison County, NYNY67,120+4,001+1146%

43Jefferson County, NYNY111,540+4,491+465%

44Ulster County, NYNY183,330+4,744−62%

45Nassau County, NYNY1,398,939+4,988−89%

46Tompkins County, NYNY104,047+5,063+111%

47Rensselaer County, NYNY160,510+6,891−464%

48Ontario County, NYNY113,130+7,707+50%

49Schenectady County, NYNY162,581+8,172−399%

50Onondaga County, NYNY466,584+8,690−182%

51Monroe County, NYNY750,506+9,001−58%

52Albany County, NYNY321,225+9,639+389%

53Dutchess County, NYNY300,708+17,338−16%

54Saratoga County, NYNY241,343+18,972−2%

55Rockland County, NYNY357,397+24,934+17%

56Richmond County, NYNY501,290+25,002−61%

57Westchester County, NYNY1,015,743+25,654−47%

58Orange County, NYNY417,669+31,446−7%

59Kings County, NYNY2,653,963+39,374−76%

60New York County, NYNY1,664,862+48,678−2%

61Bronx County, NYNY1,406,332+52,458−59%

62Suffolk County, NYNY1,546,090+73,981−24%

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS