RANKING · 2025 ESTIMATES · 58 SHOWN OF 58

Fastest growing, California counties

California counties ranked by population growth from the 2020 census to 2025. 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

01Placer County, CACA442,081+9.2%−34.5 pts

02San Benito County, CACA70,082+9.1%−35.9 pts

03Yuba County, CACA88,691+8.7%+5.3 pts

04Madera County, CACA167,927+7.5%−32.3 pts

05San Joaquin County, CACA823,815+5.7%−11.5 pts

06Merced County, CACA297,260+5.7%−12.3 pts

07Riverside County, CACA2,544,916+5.2%−26.8 pts

08Yolo County, CACA224,410+3.7%−15.8 pts

09Amador County, CACA41,876+3.5%−13.4 pts

10Calaveras County, CACA46,605+2.9%−23.8 pts

11Fresno County, CACA1,035,456+2.7%−17.1 pts

12Tulare County, CACA485,146+2.5%−15.4 pts

13Sacramento County, CACA1,618,460+2.1%−15.4 pts

14Kern County, CACA927,068+2.0%−19.8 pts

15San Bernardino County, CACA2,224,091+1.9%−18.6 pts

16Kings County, CACA154,327+1.2%−26.4 pts

17Imperial County, CACA181,411+1.0%−29.3 pts

18Stanislaus County, CACA557,719+0.9%−19.8 pts

19El Dorado County, CACA192,323+0.6%−23.5 pts

20Solano County, CACA455,376+0.4%−15.5 pts

21Contra Costa County, CACA1,170,070+0.4%−17.7 pts

22Colusa County, CACA21,836-0.0%−15.6 pts

23San Luis Obispo County, CACA282,367-0.0%−13.6 pts

24Shasta County, CACA181,648-0.3%−11.3 pts

25Nevada County, CACA101,911-0.3%−17.5 pts

26Sonoma County, CACA486,444-0.5%−18.6 pts

27San Diego County, CACA3,282,248-0.5%−13.1 pts

28Lake County, CACA67,772-0.6%−15.7 pts

29Sutter County, CACA98,787-0.8%−23.4 pts

30Santa Clara County, CACA1,914,391-1.1%−13.5 pts

31Butte County, CACA209,211-1.1%−12.7 pts

32Orange County, CACA3,149,507-1.2%−19.3 pts

33Monterey County, CACA433,729-1.2%−14.2 pts

34Mariposa County, CACA16,918-1.2%−21.0 pts

35Santa Barbara County, CACA442,065-1.4%−9.4 pts

36Ventura County, CACA830,851-1.5%−14.1 pts

37Tehama County, CACA64,665-1.8%−14.7 pts

38Trinity County, CACA15,720-2.4%−2.1 pts

39Glenn County, CACA28,141-2.7%−9.4 pts

40Alameda County, CACA1,636,630-2.7%−15.6 pts

41San Mateo County, CACA743,568-2.7%−11.6 pts

42Modoc County, CACA8,426-3.1%−0.8 pts

43Los Angeles County, CACA9,694,934-3.2%−10.6 pts

44Marin County, CACA253,694-3.3%−10.8 pts

45Humboldt County, CACA131,647-3.5%−9.7 pts

46Napa County, CACA132,949-3.7%−15.9 pts

47Mendocino County, CACA88,122-3.8%−11.2 pts

48Sierra County, CACA3,098-4.3%−11.4 pts

49Tuolumne County, CACA53,160-4.4%−16.9 pts

50Santa Cruz County, CACA258,852-4.4%−15.7 pts

51Inyo County, CACA18,158-4.5%−2.7 pts

52Siskiyou County, CACA42,013-4.7%−6.4 pts

53Del Norte County, CACA26,410-4.8%−22.1 pts

54Mono County, CACA12,505-5.2%−34.3 pts

55San Francisco County, CACA826,079-5.5%−12.8 pts

56Plumas County, CACA18,583-6.1%−11.6 pts

57Alpine County, CACA1,043-13.4%−21.9 pts

58Lassen County, CACA28,117-14.1%−36.7 pts

SHOWING 1–58 OF 58

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES