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. The median across all 58 is -0.8%. Biggest climber in the top 100 since 2020: Calaveras County, CA, up 40 places to #10.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲2Placer County, CACA442,081+9.2%−34.5 pts

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

03▲2Yuba County, CACA88,691+8.7%+5.3 pts

04▲29Madera County, CACA167,927+7.5%−32.3 pts

05▼1San Joaquin County, CACA823,815+5.7%−11.5 pts

06▲4Merced County, CACA297,260+5.7%−12.3 pts

07▲2Riverside County, CACA2,544,916+5.2%−26.8 pts

08▲8Yolo County, CACA224,410+3.7%−15.8 pts

09▲13Amador County, CACA41,876+3.5%−13.4 pts

10▲40Calaveras County, CACA46,605+2.9%−23.8 pts

11▲3Fresno County, CACA1,035,456+2.7%−17.1 pts

12▲7Tulare County, CACA485,146+2.5%−15.4 pts

13▼7Sacramento County, CACA1,618,460+2.1%−15.4 pts

14▲1Kern County, CACA927,068+2.0%−19.8 pts

15▲3San Bernardino County, CACA2,224,091+1.9%−18.6 pts

16▲33Kings County, CACA154,327+1.2%−26.4 pts

17▲19Imperial County, CACA181,411+1.0%−29.3 pts

18▼1Stanislaus County, CACA557,719+0.9%−19.8 pts

19▲7El Dorado County, CACA192,323+0.6%−23.5 pts

20▼9Solano County, CACA455,376+0.4%−15.5 pts

21▼13Contra Costa County, CACA1,170,070+0.4%−17.7 pts

22▲21Colusa County, CACA21,836-0.0%−15.6 pts

23▲6San Luis Obispo County, CACA282,367-0.0%−13.6 pts

24▲14Shasta County, CACA181,648-0.3%−11.3 pts

25▲9Nevada County, CACA101,911-0.3%−17.5 pts

26▲20Sonoma County, CACA486,444-0.5%−18.6 pts

27▼7San Diego County, CACA3,282,248-0.5%−13.1 pts

28▼1Lake County, CACA67,772-0.6%−15.7 pts

29▼1Sutter County, CACA98,787-0.8%−23.4 pts

30▼18Santa Clara County, CACA1,914,391-1.1%−13.5 pts

31▲23Butte County, CACA209,211-1.1%−12.7 pts

32▼9Orange County, CACA3,149,507-1.2%−19.3 pts

33▼9Monterey County, CACA433,729-1.2%−14.2 pts

34▲21Mariposa County, CACA16,918-1.2%−21.0 pts

35▼10Santa Barbara County, CACA442,065-1.4%−9.4 pts

36▲4Ventura County, CACA830,851-1.5%−14.1 pts

37▼5Tehama County, CACA64,665-1.8%−14.7 pts

38▼37Trinity County, CACA15,720-2.4%−2.1 pts

39▼2Glenn County, CACA28,141-2.7%−9.4 pts

40▼33Alameda County, CACA1,636,630-2.7%−15.6 pts

41▼20San Mateo County, CACA743,568-2.7%−11.6 pts

42▲16Modoc County, CACA8,426-3.1%−0.8 pts

43▼1Los Angeles County, CACA9,694,934-3.2%−10.6 pts

44▼13Marin County, CACA253,694-3.3%−10.8 pts

45▼1Humboldt County, CACA131,647-3.5%−9.7 pts

46▼1Napa County, CACA132,949-3.7%−15.9 pts

47▼17Mendocino County, CACA88,122-3.8%−11.2 pts

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

49▼2Tuolumne County, CACA53,160-4.4%−16.9 pts

50▼15Santa Cruz County, CACA258,852-4.4%−15.7 pts

51▼12Inyo 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

54▲3Mono County, CACA12,505-5.2%−34.3 pts

55▼42San Francisco County, CACA826,079-5.5%−12.8 pts

56▼5Plumas County, CACA18,583-6.1%−11.6 pts

57▼16Alpine County, CACA1,043-13.4%−21.9 pts

58▼2Lassen County, CACA28,117-14.1%−36.7 pts

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES