RANKING · 1990 CENSUS · 58 SHOWN OF 58

Least educated, California counties · 1990

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.

Flip the list · Most educated, US counties →

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPBACHELOR'S DEGREE OR HIGHERVS 2000

01Kings County, CACA154,3279.0%−14%

02Glenn County, CACA28,1419.4%−12%

03Yuba County, CACA88,6919.5%−8%

04Imperial County, CACA181,4119.7%−6%

05Del Norte County, CACA26,41010.0%−9%

06Tehama County, CACA64,66510.2%−9%

07Lake County, CACA67,77210.7%−11%

08Colusa County, CACA21,83611.1%+4%

09Modoc County, CACA8,42611.2%−10%

10Lassen County, CACA28,11711.7%+9%

11Madera County, CACA167,92711.7%−3%

12Tulare County, CACA485,14611.8%+3%

13Merced County, CACA297,26012.0%+9%

14Trinity County, CACA15,72012.9%−17%

15Stanislaus County, CACA557,71913.0%−8%

16San Joaquin County, CACA823,81513.2%−9%

17Kern County, CACA927,06813.3%−2%

18Inyo County, CACA18,15813.5%−21%

19Shasta County, CACA181,64813.7%−17%

20Amador County, CACA41,87614.0%−16%

21Siskiyou County, CACA42,01314.2%−20%

22San Benito County, CACA70,08214.4%−16%

23Calaveras County, CACA46,60514.4%−16%

24Riverside County, CACA2,544,91614.6%−12%

25Tuolumne County, CACA53,16014.7%−9%

26San Bernardino County, CACA2,224,09114.9%−6%

27Plumas County, CACA18,58315.1%−14%

28Sutter County, CACA98,78715.4%+1%

29Sierra County, CACA3,09815.9%−8%

30Mariposa County, CACA16,91816.8%−17%

31Fresno County, CACA1,035,45616.9%−4%

32Mendocino County, CACA88,12217.8%−12%

33Solano County, CACA455,37618.7%−12%

34Butte County, CACA209,21119.5%−11%

35Humboldt County, CACA131,64720.0%−13%

36El Dorado County, CACA192,32320.8%−22%

37Monterey County, CACA433,72921.5%−4%

38Mono County, CACA12,50521.9%−24%

39Nevada County, CACA101,91122.1%−15%

40Napa County, CACA132,94922.3%−15%

41Los Angeles County, CACA9,694,93422.3%−10%

42Placer County, CACA442,08122.7%−25%

43San Luis Obispo County, CACA282,36722.9%−14%

44Sacramento County, CACA1,618,46023.0%−7%

45Ventura County, CACA830,85123.0%−15%

46Alpine County, CACA1,04324.0%−15%

47Sonoma County, CACA486,44424.5%−14%

48San Diego County, CACA3,282,24825.3%−14%

49Santa Barbara County, CACA442,06526.6%−9%

50Orange County, CACA3,149,50727.8%−10%

51Alameda County, CACA1,636,63028.8%−17%

52Santa Cruz County, CACA258,85229.7%−13%

53Yolo County, CACA224,41030.3%−11%

54San Mateo County, CACA743,56831.3%−20%

55Contra Costa County, CACA1,170,07031.6%−10%

56Santa Clara County, CACA1,914,39132.6%−20%

57San Francisco County, CACA826,07935.0%−22%

58Marin County, CACA253,69444.0%−14%

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

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