RANKING · 2020 CENSUS · 58 SHOWN OF 58

Most racially diverse, California counties · 2020

California counties ranked by the CensusEasy Diversity Score (0 to 100), the chance two random residents are of a different race or ethnicity (2023 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDOldest by median age Youngest by median age Most foreign-born residents Highest uninsured rate Most women Most men

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPDIVERSITY SCOREVS 2000

01Solano County, CACA455,37694+16%

02Alameda County, CACA1,636,63093+6%

03Contra Costa County, CACA1,170,07091+26%

04Sacramento County, CACA1,618,46090+26%

05San Mateo County, CACA743,56889+13%

06San Joaquin County, CACA823,81588+12%

07San Francisco County, CACA826,07988+6%

08Santa Clara County, CACA1,914,39187+6%

09Orange County, CACA3,149,50786+14%

10Sutter County, CACA98,78785+28%

11Yolo County, CACA224,41084+23%

12Los Angeles County, CACA9,694,93484+1%

13San Diego County, CACA3,282,24884+15%

14Riverside County, CACA2,544,91679+9%

15Yuba County, CACA88,69178+35%

16San Bernardino County, CACA2,224,09178+1%

17Fresno County, CACA1,035,45677+0%

18Ventura County, CACA830,85177+14%

19Napa County, CACA132,94976+42%

20Stanislaus County, CACA557,71976+15%

21Santa Barbara County, CACA442,06574+12%

22Kern County, CACA927,06874+2%

23Kings County, CACA154,32772−4%

24Del Norte County, CACA26,41072+54%

25Santa Cruz County, CACA258,85271+23%

26Inyo County, CACA18,15871+114%

27Glenn County, CACA28,14169+16%

28Sonoma County, CACA486,44469+51%

29Lassen County, CACA28,11769+37%

30Monterey County, CACA433,72968−6%

31Merced County, CACA297,26068−9%

32Madera County, CACA167,92767−3%

33Mendocino County, CACA88,12266+65%

34San Benito County, CACA70,08265−2%

35Alpine County, CACA1,04365+167%

36Marin County, CACA253,69464+56%

37Colusa County, CACA21,83663−2%

38Tehama County, CACA64,66562+67%

39San Luis Obispo County, CACA282,36762+40%

40Butte County, CACA209,21162+77%

41Tulare County, CACA485,14661−10%

42Lake County, CACA67,77261+85%

43Placer County, CACA442,08161+98%

44Trinity County, CACA15,72059+369%

45Mono County, CACA12,50559+44%

46Humboldt County, CACA131,64758+157%

47Amador County, CACA41,87652+64%

48Siskiyou County, CACA42,01352+111%

49El Dorado County, CACA192,32350+83%

50Shasta County, CACA181,64847+135%

51Mariposa County, CACA16,91847+111%

52Modoc County, CACA8,42645+52%

53Tuolumne County, CACA53,16045+74%

54Calaveras County, CACA46,60543+114%

55Plumas County, CACA18,58338+125%

56Nevada County, CACA101,91136+126%

57Imperial County, CACA181,41132−38%

58Sierra County, CACA3,09831+105%

SHOWING 1–58 OF 58

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