RANKING · 2010 CENSUS · 58 SHOWN OF 58

Fastest growing, California counties · 2010

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

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SAME RANKING BYCities States Metros

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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Riverside County, CACA2,544,916+41.7%+9.7 pts

02Placer County, CACA442,081+40.3%−3.5 pts

03Kern County, CACA927,068+26.9%+5.2 pts

04Imperial County, CACA181,411+22.6%−7.6 pts

05Madera County, CACA167,927+22.5%−17.2 pts

06San Joaquin County, CACA823,815+21.6%+4.3 pts

07Merced County, CACA297,260+21.5%+3.5 pts

08Tulare County, CACA485,146+20.2%+2.2 pts

09Sutter County, CACA98,787+20.0%−2.5 pts

10Yuba County, CACA88,691+19.8%+16.4 pts

11Yolo County, CACA224,410+19.1%−0.5 pts

12San Bernardino County, CACA2,224,091+19.1%−1.5 pts

13Kings County, CACA154,327+18.2%−9.4 pts

14Fresno County, CACA1,035,456+16.4%−3.4 pts

15Sacramento County, CACA1,618,460+16.0%−1.5 pts

16El Dorado County, CACA192,323+15.8%−8.2 pts

17Stanislaus County, CACA557,719+15.1%−5.5 pts

18Colusa County, CACA21,836+13.9%−1.6 pts

19Tehama County, CACA64,665+13.2%+0.3 pts

20Calaveras County, CACA46,605+12.4%−14.4 pts

21Lake County, CACA67,772+10.9%−4.3 pts

22Contra Costa County, CACA1,170,070+10.6%−7.5 pts

23Mono County, CACA12,505+10.5%−18.6 pts

24San Diego County, CACA3,282,248+10.0%−2.6 pts

25Napa County, CACA132,949+9.8%−2.4 pts

26Ventura County, CACA830,851+9.3%−3.3 pts

27San Luis Obispo County, CACA282,367+9.3%−4.3 pts

28Shasta County, CACA181,648+8.6%−2.5 pts

29Amador County, CACA41,876+8.5%−8.3 pts

30Butte County, CACA209,211+8.3%−3.3 pts

31Nevada County, CACA101,911+7.3%−9.9 pts

32Mariposa County, CACA16,918+6.5%−13.2 pts

33Humboldt County, CACA131,647+6.4%+0.2 pts

34Glenn County, CACA28,141+6.3%−0.4 pts

35Santa Barbara County, CACA442,065+6.1%−1.9 pts

36Santa Clara County, CACA1,914,391+5.9%−6.5 pts

37Trinity County, CACA15,720+5.9%+6.2 pts

38Orange County, CACA3,149,507+5.8%−12.3 pts

39Sonoma County, CACA486,444+5.5%−12.6 pts

40Solano County, CACA455,376+4.8%−11.1 pts

41Alameda County, CACA1,636,630+4.6%−8.3 pts

42Del Norte County, CACA26,410+4.0%−13.2 pts

43San Benito County, CACA70,082+3.8%−41.2 pts

44San Francisco County, CACA826,079+3.7%−3.6 pts

45Inyo County, CACA18,158+3.3%+5.2 pts

46Monterey County, CACA433,729+3.3%−9.7 pts

47Lassen County, CACA28,117+3.2%−19.4 pts

48Los Angeles County, CACA9,694,934+3.1%−4.3 pts

49Santa Cruz County, CACA258,852+2.7%−8.6 pts

50Modoc County, CACA8,426+2.5%+4.9 pts

51Marin County, CACA253,694+2.1%−5.4 pts

52Mendocino County, CACA88,122+1.8%−5.5 pts

53San Mateo County, CACA743,568+1.6%−7.3 pts

54Tuolumne County, CACA53,160+1.6%−10.9 pts

55Siskiyou County, CACA42,013+1.4%−0.4 pts

56Alpine County, CACA1,043-2.7%−11.3 pts

57Plumas County, CACA18,583-3.9%−9.4 pts

58Sierra County, CACA3,098-8.9%−16.0 pts

SHOWING 1–58 OF 58

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