RANKING · 2000 CENSUS · 58 SHOWN OF 58

Fastest shrinking, California counties · 2000

California counties with the steepest population decline since the prior decennial census. This list covers the 58 counties in California that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Modoc County, CACA8,426-2.4%+0%

02Inyo County, CACA18,158-1.8%+0%

03Trinity County, CACA15,720-0.3%+0%

04Siskiyou County, CACA42,013+1.8%+0%

05Yuba County, CACA88,691+3.4%+0%

06Plumas County, CACA18,583+5.5%+0%

07Humboldt County, CACA131,647+6.2%+0%

08Glenn County, CACA28,141+6.7%+0%

09Sierra County, CACA3,098+7.1%+0%

10San Francisco County, CACA826,079+7.3%+0%

11Mendocino County, CACA88,122+7.4%+0%

12Los Angeles County, CACA9,694,934+7.4%+0%

13Marin County, CACA253,694+7.5%+0%

14Santa Barbara County, CACA442,065+8.0%+0%

15Alpine County, CACA1,043+8.5%+0%

16San Mateo County, CACA743,568+8.9%+0%

17Shasta County, CACA181,648+11.0%+0%

18Santa Cruz County, CACA258,852+11.3%+0%

19Butte County, CACA209,211+11.6%+0%

20Napa County, CACA132,949+12.2%+0%

21Santa Clara County, CACA1,914,391+12.4%+0%

22Tuolumne County, CACA53,160+12.5%+0%

23Ventura County, CACA830,851+12.6%+0%

24San Diego County, CACA3,282,248+12.6%+0%

25Alameda County, CACA1,636,630+12.9%+0%

26Tehama County, CACA64,665+12.9%+0%

27Monterey County, CACA433,729+13.0%+0%

28San Luis Obispo County, CACA282,367+13.6%+0%

29Lake County, CACA67,772+15.2%+0%

30Colusa County, CACA21,836+15.5%+0%

31Solano County, CACA455,376+15.9%+0%

32Amador County, CACA41,876+16.8%+0%

33Nevada County, CACA101,911+17.2%+0%

34Del Norte County, CACA26,410+17.3%+0%

35San Joaquin County, CACA823,815+17.3%+0%

36Sacramento County, CACA1,618,460+17.5%+0%

37Tulare County, CACA485,146+18.0%+0%

38Merced County, CACA297,260+18.0%+0%

39Contra Costa County, CACA1,170,070+18.1%+0%

40Orange County, CACA3,149,507+18.1%+0%

41Sonoma County, CACA486,444+18.1%+0%

42Yolo County, CACA224,410+19.5%+0%

43Fresno County, CACA1,035,456+19.8%+0%

44Mariposa County, CACA16,918+19.8%+0%

45San Bernardino County, CACA2,224,091+20.5%+0%

46Stanislaus County, CACA557,719+20.6%+0%

47Kern County, CACA927,068+21.7%+0%

48Sutter County, CACA98,787+22.5%+0%

49Lassen County, CACA28,117+22.6%+0%

50El Dorado County, CACA192,323+24.1%+0%

51Calaveras County, CACA46,605+26.7%+0%

52Kings County, CACA154,327+27.6%+0%

53Mono County, CACA12,505+29.1%+0%

54Imperial County, CACA181,411+30.2%+0%

55Riverside County, CACA2,544,916+32.0%+0%

56Madera County, CACA167,927+39.8%+0%

57Placer County, CACA442,081+43.8%+0%

58San Benito County, CACA70,082+45.1%+0%

SHOWING 1–58 OF 58

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES