RANKING · 2010 CENSUS · 58 SHOWN OF 58

Most racially diverse, California counties · 2010

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

01Alameda County, CACA1,636,63093+6%

02Solano County, CACA455,37691+13%

03Santa Clara County, CACA1,914,39187+7%

04San Joaquin County, CACA823,81587+10%

05San Mateo County, CACA743,56886+10%

06San Francisco County, CACA826,07986+3%

07Sacramento County, CACA1,618,46085+19%

08Contra Costa County, CACA1,170,07085+18%

09Los Angeles County, CACA9,694,93483+1%

10Orange County, CACA3,149,50782+9%

11San Diego County, CACA3,282,24881+11%

12Sutter County, CACA98,78780+21%

13Yolo County, CACA224,41080+17%

14San Bernardino County, CACA2,224,09179+3%

15Riverside County, CACA2,544,91679+9%

16Fresno County, CACA1,035,45679+2%

17Kern County, CACA927,06876+5%

18Kings County, CACA154,32776+1%

19Stanislaus County, CACA557,71975+13%

20Ventura County, CACA830,85174+10%

21Merced County, CACA297,26073−1%

22Yuba County, CACA88,69173+26%

23Santa Barbara County, CACA442,06573+10%

24Monterey County, CACA433,72972−1%

25Napa County, CACA132,94971+32%

26Madera County, CACA167,92770+2%

27Glenn County, CACA28,14169+15%

28Colusa County, CACA21,83668+5%

29Santa Cruz County, CACA258,85267+17%

30San Benito County, CACA70,08267+2%

31Del Norte County, CACA26,41067+43%

32Tulare County, CACA485,14666−3%

33Inyo County, CACA18,15863+91%

34Lassen County, CACA28,11763+25%

35Sonoma County, CACA486,44462+35%

36Alpine County, CACA1,04359+144%

37Mono County, CACA12,50559+45%

38Mendocino County, CACA88,12259+47%

39San Luis Obispo County, CACA282,36756+26%

40Marin County, CACA253,69454+32%

41Tehama County, CACA64,66554+44%

42Lake County, CACA67,77252+56%

43Butte County, CACA209,21151+46%

44Placer County, CACA442,08149+60%

45Humboldt County, CACA131,64747+109%

46Amador County, CACA41,87644+39%

47Modoc County, CACA8,42644+47%

48Siskiyou County, CACA42,01343+76%

49El Dorado County, CACA192,32343+55%

50Imperial County, CACA181,41142−19%

51Tuolumne County, CACA53,16040+53%

52Shasta County, CACA181,64838+91%

53Mariposa County, CACA16,91837+65%

54Trinity County, CACA15,72036+182%

55Calaveras County, CACA46,60535+75%

56Plumas County, CACA18,58332+90%

57Nevada County, CACA101,91130+83%

58Sierra County, CACA3,09822+43%

SHOWING 1–58 OF 58

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