RANKING · 2000 CENSUS · 58 SHOWN OF 58

Most population lost, California counties · 2000

California counties that lost the most residents from the 1990 census to 2000, by raw count of people rather than percentage. This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is +27,568.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population gained Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

01Inyo County, CACA18,158-336–

02Modoc County, CACA8,426-229–

03Trinity County, CACA15,720-41–

04Alpine County, CACA1,043+95–

05Sierra County, CACA3,098+237–

06Siskiyou County, CACA42,013+770–

07Plumas County, CACA18,583+1,085–

08Glenn County, CACA28,141+1,655–

09Yuba County, CACA88,691+1,991–

10Colusa County, CACA21,836+2,529–

11Mariposa County, CACA16,918+2,828–

12Mono County, CACA12,505+2,897–

13Del Norte County, CACA26,410+4,047–

14Amador County, CACA41,876+5,061–

15Mendocino County, CACA88,122+5,920–

16Tuolumne County, CACA53,160+6,045–

17Lassen County, CACA28,117+6,230–

18Tehama County, CACA64,665+6,414–

19Humboldt County, CACA131,647+7,400–

20Lake County, CACA67,772+7,678–

21Calaveras County, CACA46,605+8,556–

22Napa County, CACA132,949+13,514–

23Nevada County, CACA101,911+13,523–

24Sutter County, CACA98,787+14,515–

25Shasta County, CACA181,648+16,220–

26San Benito County, CACA70,082+16,537–

27Marin County, CACA253,694+17,193–

28Butte County, CACA209,211+21,051–

29Santa Cruz County, CACA258,852+25,868–

30Yolo County, CACA224,410+27,568–

31Kings County, CACA154,327+27,992–

32San Luis Obispo County, CACA282,367+29,519–

33Santa Barbara County, CACA442,065+29,739–

34El Dorado County, CACA192,323+30,304–

35Merced County, CACA297,260+32,151–

36Imperial County, CACA181,411+33,058–

37Madera County, CACA167,927+35,019–

38Monterey County, CACA433,729+46,102–

39San Francisco County, CACA826,079+52,774–

40Solano County, CACA455,376+54,121–

41Tulare County, CACA485,146+56,100–

42San Mateo County, CACA743,568+57,538–

43Sonoma County, CACA486,444+70,392–

44Placer County, CACA442,081+75,603–

45Stanislaus County, CACA557,719+76,475–

46San Joaquin County, CACA823,815+82,970–

47Ventura County, CACA830,851+84,181–

48Kern County, CACA927,068+118,168–

49Fresno County, CACA1,035,456+131,917–

50Contra Costa County, CACA1,170,070+145,084–

51Alameda County, CACA1,636,630+164,559–

52Sacramento County, CACA1,618,460+182,280–

53Santa Clara County, CACA1,914,391+185,008–

54San Bernardino County, CACA2,224,091+291,054–

55San Diego County, CACA3,282,248+315,817–

56Riverside County, CACA2,544,916+374,974–

57Orange County, CACA3,149,507+435,733–

58Los Angeles County, CACA9,694,934+656,174–

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS