RANKING · 2010 CENSUS · 58 SHOWN OF 58

Least educated, California counties · 2010

California counties with the smallest share of adults 25+ holding a bachelor's degree or higher (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

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPBACHELOR'S DEGREE OR HIGHERVS 2000

01Colusa County, CACA21,83611.7%+10%

02Kings County, CACA154,32711.8%+14%

03Imperial County, CACA181,41112.2%+18%

04Lassen County, CACA28,11712.4%+16%

05Yuba County, CACA88,69112.5%+21%

06Merced County, CACA297,26012.5%+13%

07Tehama County, CACA64,66512.6%+11%

08Tulare County, CACA485,14613.0%+13%

09Madera County, CACA167,92713.5%+13%

10Del Norte County, CACA26,41014.3%+30%

11Kern County, CACA927,06814.7%+9%

12Modoc County, CACA8,42615.6%+26%

13Glenn County, CACA28,14116.2%+51%

14Stanislaus County, CACA557,71916.3%+16%

15Lake County, CACA67,77216.4%+36%

16Tuolumne County, CACA53,16017.3%+8%

17San Joaquin County, CACA823,81517.5%+20%

18San Benito County, CACA70,08218.3%+7%

19San Bernardino County, CACA2,224,09118.4%+15%

20Sutter County, CACA98,78718.7%+22%

21Amador County, CACA41,87619.0%+14%

22Trinity County, CACA15,72019.5%+25%

23Calaveras County, CACA46,60519.6%+15%

24Fresno County, CACA1,035,45619.7%+12%

25Plumas County, CACA18,58319.8%+13%

26Shasta County, CACA181,64820.0%+21%

27Mariposa County, CACA16,91820.4%+1%

28Riverside County, CACA2,544,91620.5%+23%

29Inyo County, CACA18,15820.9%+22%

30Siskiyou County, CACA42,01322.6%+27%

31Mendocino County, CACA88,12222.7%+12%

32Sierra County, CACA3,09823.0%+34%

33Monterey County, CACA433,72923.4%+4%

34Solano County, CACA455,37624.0%+12%

35Butte County, CACA209,21124.1%+11%

36Humboldt County, CACA131,64726.3%+14%

37Sacramento County, CACA1,618,46027.8%+12%

38Los Angeles County, CACA9,694,93429.0%+17%

39Alpine County, CACA1,04329.7%+5%

40Mono County, CACA12,50529.9%+3%

41Napa County, CACA132,94930.0%+14%

42San Luis Obispo County, CACA282,36730.6%+14%

43Ventura County, CACA830,85130.8%+14%

44Santa Barbara County, CACA442,06531.0%+5%

45El Dorado County, CACA192,32331.1%+17%

46Sonoma County, CACA486,44431.5%+10%

47Nevada County, CACA101,91131.9%+22%

48San Diego County, CACA3,282,24834.1%+15%

49Placer County, CACA442,08134.1%+13%

50Orange County, CACA3,149,50736.0%+17%

51Santa Cruz County, CACA258,85237.3%+9%

52Yolo County, CACA224,41037.8%+11%

53Contra Costa County, CACA1,170,07038.2%+9%

54Alameda County, CACA1,636,63040.3%+15%

55San Mateo County, CACA743,56844.0%+13%

56Santa Clara County, CACA1,914,39145.3%+12%

57San Francisco County, CACA826,07951.2%+14%

58Marin County, CACA253,69454.1%+6%

SHOWING 1–58 OF 58

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