RANKING · 2000 CENSUS · 58 SHOWN OF 58

Most racially diverse, California counties · 2000

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, CACA1,636,63088+0%

02San Francisco County, CACA826,07983+0%

03Los Angeles County, CACA9,694,93483+0%

04Santa Clara County, CACA1,914,39182+0%

05Solano County, CACA455,37681+0%

06San Joaquin County, CACA823,81579+0%

07San Mateo County, CACA743,56878+0%

08San Bernardino County, CACA2,224,09177+0%

09Fresno County, CACA1,035,45677+0%

10Orange County, CACA3,149,50775+0%

11Kings County, CACA154,32775+0%

12Merced County, CACA297,26074+0%

13Monterey County, CACA433,72973+0%

14San Diego County, CACA3,282,24873+0%

15Riverside County, CACA2,544,91672+0%

16Kern County, CACA927,06872+0%

17Contra Costa County, CACA1,170,07072+0%

18Sacramento County, CACA1,618,46071+0%

19Madera County, CACA167,92769+0%

20Yolo County, CACA224,41068+0%

21Tulare County, CACA485,14667+0%

22Ventura County, CACA830,85167+0%

23Sutter County, CACA98,78767+0%

24Santa Barbara County, CACA442,06566+0%

25San Benito County, CACA70,08266+0%

26Stanislaus County, CACA557,71966+0%

27Colusa County, CACA21,83665+0%

28Glenn County, CACA28,14160+0%

29Yuba County, CACA88,69158+0%

30Santa Cruz County, CACA258,85258+0%

31Napa County, CACA132,94954+0%

32Imperial County, CACA181,41151+0%

33Lassen County, CACA28,11751+0%

34Del Norte County, CACA26,41047+0%

35Sonoma County, CACA486,44446+0%

36San Luis Obispo County, CACA282,36744+0%

37Marin County, CACA253,69441+0%

38Mono County, CACA12,50541+0%

39Mendocino County, CACA88,12240+0%

40Tehama County, CACA64,66537+0%

41Butte County, CACA209,21135+0%

42Inyo County, CACA18,15833+0%

43Lake County, CACA67,77233+0%

44Amador County, CACA41,87632+0%

45Placer County, CACA442,08131+0%

46Modoc County, CACA8,42630+0%

47El Dorado County, CACA192,32328+0%

48Tuolumne County, CACA53,16026+0%

49Siskiyou County, CACA42,01325+0%

50Alpine County, CACA1,04324+0%

51Humboldt County, CACA131,64723+0%

52Mariposa County, CACA16,91822+0%

53Calaveras County, CACA46,60520+0%

54Shasta County, CACA181,64820+0%

55Plumas County, CACA18,58317+0%

56Nevada County, CACA101,91116+0%

57Sierra County, CACA3,09815+0%

58Trinity County, CACA15,72013+0%

SHOWING 1–58 OF 58

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