CensusEasy
RANKING · 2010 CENSUS · 58 SHOWN OF 58

Least racially diverse, California counties · 2010

California counties with the lowest CensusEasy Diversity Score, where most residents share the same 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 BYCitiesStatesMetrosZIP codes
RELATEDOldest by median ageYoungest by median ageMost foreign-born residentsHighest uninsured rateMost womenMost men
YEAR19902000201020202024
Least racially diverse by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPDIVERSITY SCOREVS 2000
01Sierra County, CACA3,09822+43%
02Nevada County, CACA101,91130+83%
03Plumas County, CACA18,58332+90%
04Calaveras County, CACA46,60535+75%
05Trinity County, CACA15,72036+182%
06Mariposa County, CACA16,91837+65%
07Shasta County, CACA181,64838+91%
08Tuolumne County, CACA53,16040+53%
09Imperial County, CACA181,41142−19%
10El Dorado County, CACA192,32343+55%
11Siskiyou County, CACA42,01343+76%
12Modoc County, CACA8,42644+47%
13Amador County, CACA41,87644+39%
14Humboldt County, CACA131,64747+109%
15Placer County, CACA442,08149+60%
16Butte County, CACA209,21151+46%
17Lake County, CACA67,77252+56%
18Tehama County, CACA64,66554+44%
19Marin County, CACA253,69454+32%
20San Luis Obispo County, CACA282,36756+26%
21Mendocino County, CACA88,12259+47%
22Mono County, CACA12,50559+45%
23Alpine County, CACA1,04359+144%
24Sonoma County, CACA486,44462+35%
25Lassen County, CACA28,11763+25%
26Inyo County, CACA18,15863+91%
27Tulare County, CACA485,14666−3%
28Del Norte County, CACA26,41067+43%
29San Benito County, CACA70,08267+2%
30Santa Cruz County, CACA258,85267+17%
31Colusa County, CACA21,83668+5%
32Glenn County, CACA28,14169+15%
33Madera County, CACA167,92770+2%
34Napa County, CACA132,94971+32%
35Monterey County, CACA433,72972−1%
36Santa Barbara County, CACA442,06573+10%
37Yuba County, CACA88,69173+26%
38Merced County, CACA297,26073−1%
39Ventura County, CACA830,85174+10%
40Stanislaus County, CACA557,71975+13%
41Kings County, CACA154,32776+1%
42Kern County, CACA927,06876+5%
43Fresno County, CACA1,035,45679+2%
44Riverside County, CACA2,544,91679+9%
45San Bernardino County, CACA2,224,09179+3%
46Yolo County, CACA224,41080+17%
47Sutter County, CACA98,78780+21%
48San Diego County, CACA3,282,24881+11%
49Orange County, CACA3,149,50782+9%
50Los Angeles County, CACA9,694,93483+1%
51Contra Costa County, CACA1,170,07085+18%
52Sacramento County, CACA1,618,46085+19%
53San Francisco County, CACA826,07986+3%
54San Mateo County, CACA743,56886+10%
55San Joaquin County, CACA823,81587+10%
56Santa Clara County, CACA1,914,39187+7%
57Solano County, CACA455,37691+13%
58Alameda County, CACA1,636,63093+6%
SHOWING 1–58 OF 58
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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES