RANKING · 2024 ACS · 58 SHOWN OF 58

Least educated, California counties

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

01Lassen County, CACA28,11713.1%+22%

02Kings County, CACA154,32713.6%+32%

03Glenn County, CACA28,14115.1%+41%

04Merced County, CACA297,26015.3%+39%

05Imperial County, CACA181,41116.1%+56%

06Colusa County, CACA21,83616.4%+54%

07Tulare County, CACA485,14616.6%+45%

08Yuba County, CACA88,69117.7%+72%

09Lake County, CACA67,77217.8%+48%

10Madera County, CACA167,92717.9%+49%

11Kern County, CACA927,06818.8%+39%

12Tehama County, CACA64,66519.3%+71%

13Stanislaus County, CACA557,71919.6%+40%

14Sutter County, CACA98,78720.9%+37%

15Del Norte County, CACA26,41021.4%+95%

16Trinity County, CACA15,72022.4%+44%

17Amador County, CACA41,87622.4%+35%

18Plumas County, CACA18,58322.5%+29%

19San Joaquin County, CACA823,81522.7%+57%

20San Bernardino County, CACA2,224,09123.3%+46%

21Siskiyou County, CACA42,01323.3%+31%

22Shasta County, CACA181,64823.8%+43%

23Calaveras County, CACA46,60523.9%+40%

24San Benito County, CACA70,08224.1%+41%

25Fresno County, CACA1,035,45624.3%+38%

26Tuolumne County, CACA53,16024.6%+53%

27Modoc County, CACA8,42624.8%+101%

28Mendocino County, CACA88,12225.2%+24%

29Riverside County, CACA2,544,91625.6%+54%

30Sierra County, CACA3,09825.8%+50%

31Monterey County, CACA433,72928.2%+25%

32Solano County, CACA455,37628.8%+34%

33Inyo County, CACA18,15831.5%+84%

34Mariposa County, CACA16,91831.8%+58%

35Butte County, CACA209,21131.9%+46%

36Mono County, CACA12,50532.2%+11%

37Humboldt County, CACA131,64733.1%+44%

38Sacramento County, CACA1,618,46034.1%+38%

39Los Angeles County, CACA9,694,93436.0%+45%

40Ventura County, CACA830,85136.1%+34%

41Santa Barbara County, CACA442,06536.8%+25%

42Sonoma County, CACA486,44438.5%+35%

43Napa County, CACA132,94939.8%+51%

44San Luis Obispo County, CACA282,36739.8%+49%

45El Dorado County, CACA192,32340.0%+51%

46Alpine County, CACA1,04341.1%+46%

47Nevada County, CACA101,91141.5%+59%

48San Diego County, CACA3,282,24843.2%+46%

49Placer County, CACA442,08143.2%+43%

50Santa Cruz County, CACA258,85243.9%+29%

51Orange County, CACA3,149,50744.1%+43%

52Yolo County, CACA224,41044.8%+31%

53Contra Costa County, CACA1,170,07045.2%+29%

54Alameda County, CACA1,636,63052.2%+50%

55San Mateo County, CACA743,56853.7%+38%

56Santa Clara County, CACA1,914,39156.5%+40%

57San Francisco County, CACA826,07960.3%+34%

58Marin County, CACA253,69461.1%+19%

SHOWING 1–58 OF 58

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