RANKING · 2010 CENSUS · 58 SHOWN OF 58

Fastest shrinking, California counties · 2010

California counties with the steepest population decline from the 2000 census to 2010. This list covers the 58 counties in California that qualify, ranked against each other statewide.

Flip the list · Fastest growing, US counties →

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros

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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Sierra County, CACA3,098-8.9%−16.0 pts

02Plumas County, CACA18,583-3.9%−9.4 pts

03Alpine County, CACA1,043-2.7%−11.3 pts

04Siskiyou County, CACA42,013+1.4%−0.4 pts

05Tuolumne County, CACA53,160+1.6%−10.9 pts

06San Mateo County, CACA743,568+1.6%−7.3 pts

07Mendocino County, CACA88,122+1.8%−5.5 pts

08Marin County, CACA253,694+2.1%−5.4 pts

09Modoc County, CACA8,426+2.5%+4.9 pts

10Santa Cruz County, CACA258,852+2.7%−8.6 pts

11Los Angeles County, CACA9,694,934+3.1%−4.3 pts

12Lassen County, CACA28,117+3.2%−19.4 pts

13Monterey County, CACA433,729+3.3%−9.7 pts

14Inyo County, CACA18,158+3.3%+5.2 pts

15San Francisco County, CACA826,079+3.7%−3.6 pts

16San Benito County, CACA70,082+3.8%−41.2 pts

17Del Norte County, CACA26,410+4.0%−13.2 pts

18Alameda County, CACA1,636,630+4.6%−8.3 pts

19Solano County, CACA455,376+4.8%−11.1 pts

20Sonoma County, CACA486,444+5.5%−12.6 pts

21Orange County, CACA3,149,507+5.8%−12.3 pts

22Trinity County, CACA15,720+5.9%+6.2 pts

23Santa Clara County, CACA1,914,391+5.9%−6.5 pts

24Santa Barbara County, CACA442,065+6.1%−1.9 pts

25Glenn County, CACA28,141+6.3%−0.4 pts

26Humboldt County, CACA131,647+6.4%+0.2 pts

27Mariposa County, CACA16,918+6.5%−13.2 pts

28Nevada County, CACA101,911+7.3%−9.9 pts

29Butte County, CACA209,211+8.3%−3.3 pts

30Amador County, CACA41,876+8.5%−8.3 pts

31Shasta County, CACA181,648+8.6%−2.5 pts

32San Luis Obispo County, CACA282,367+9.3%−4.3 pts

33Ventura County, CACA830,851+9.3%−3.3 pts

34Napa County, CACA132,949+9.8%−2.4 pts

35San Diego County, CACA3,282,248+10.0%−2.6 pts

36Mono County, CACA12,505+10.5%−18.6 pts

37Contra Costa County, CACA1,170,070+10.6%−7.5 pts

38Lake County, CACA67,772+10.9%−4.3 pts

39Calaveras County, CACA46,605+12.4%−14.4 pts

40Tehama County, CACA64,665+13.2%+0.3 pts

41Colusa County, CACA21,836+13.9%−1.6 pts

42Stanislaus County, CACA557,719+15.1%−5.5 pts

43El Dorado County, CACA192,323+15.8%−8.2 pts

44Sacramento County, CACA1,618,460+16.0%−1.5 pts

45Fresno County, CACA1,035,456+16.4%−3.4 pts

46Kings County, CACA154,327+18.2%−9.4 pts

47San Bernardino County, CACA2,224,091+19.1%−1.5 pts

48Yolo County, CACA224,410+19.1%−0.5 pts

49Yuba County, CACA88,691+19.8%+16.4 pts

50Sutter County, CACA98,787+20.0%−2.5 pts

51Tulare County, CACA485,146+20.2%+2.2 pts

52Merced County, CACA297,260+21.5%+3.5 pts

53San Joaquin County, CACA823,815+21.6%+4.3 pts

54Madera County, CACA167,927+22.5%−17.2 pts

55Imperial County, CACA181,411+22.6%−7.6 pts

56Kern County, CACA927,068+26.9%+5.2 pts

57Placer County, CACA442,081+40.3%−3.5 pts

58Riverside County, CACA2,544,916+41.7%+9.7 pts

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS