RANKING · 1990 CENSUS · 58 SHOWN OF 58

Fewest graduate degrees, California counties · 1990

California counties with the smallest share of adults 25+ holding a graduate or professional degree (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

RANKPLACESTATEPOPGRADUATE DEGREEVS 2000

01Glenn County, CACA28,1412.3%−21%

02Kings County, CACA154,3272.5%−8%

03Yuba County, CACA88,6912.5%−28%

04Tehama County, CACA64,6652.6%−13%

05Colusa County, CACA21,8362.8%−0%

06Lake County, CACA67,7722.9%−36%

07Trinity County, CACA15,7203.1%−37%

08Del Norte County, CACA26,4103.2%+7%

09Modoc County, CACA8,4263.3%−9%

10Tulare County, CACA485,1463.5%−5%

11Imperial County, CACA181,4113.6%−3%

12Amador County, CACA41,8763.6%−40%

13Merced County, CACA297,2603.7%+9%

14Lassen County, CACA28,1173.8%+27%

15Sierra County, CACA3,0983.8%−34%

16Madera County, CACA167,9273.9%+1%

17Stanislaus County, CACA557,7193.9%−12%

18Calaveras County, CACA46,6053.9%−30%

19Siskiyou County, CACA42,0134.0%−33%

20Shasta County, CACA181,6484.1%−23%

21San Joaquin County, CACA823,8154.1%−6%

22Inyo County, CACA18,1584.1%−38%

23San Benito County, CACA70,0824.1%−19%

24Kern County, CACA927,0684.2%−6%

25Plumas County, CACA18,5834.3%−25%

26Alpine County, CACA1,0434.3%−48%

27Tuolumne County, CACA53,1604.5%−25%

28Sutter County, CACA98,7874.8%+8%

29Riverside County, CACA2,544,9164.9%−17%

30Fresno County, CACA1,035,4565.0%−9%

31San Bernardino County, CACA2,224,0915.2%−7%

32Solano County, CACA455,3765.3%−17%

33Mariposa County, CACA16,9185.4%−7%

34El Dorado County, CACA192,3235.8%−32%

35Mono County, CACA12,5055.8%−42%

36Mendocino County, CACA88,1225.9%−26%

37Humboldt County, CACA131,6475.9%−20%

38Butte County, CACA209,2116.0%−15%

39Nevada County, CACA101,9116.5%−25%

40Placer County, CACA442,0816.6%−31%

41Sacramento County, CACA1,618,4607.1%−12%

42San Luis Obispo County, CACA282,3677.4%−21%

43Napa County, CACA132,9497.6%−19%

44Monterey County, CACA433,7297.6%−13%

45Los Angeles County, CACA9,694,9347.8%−11%

46Ventura County, CACA830,8517.9%−17%

47Sonoma County, CACA486,4447.9%−19%

48San Diego County, CACA3,282,2488.8%−19%

49Orange County, CACA3,149,5079.1%−12%

50Santa Barbara County, CACA442,06510.0%−12%

51Santa Cruz County, CACA258,85210.4%−17%

52Contra Costa County, CACA1,170,07010.6%−13%

53Alameda County, CACA1,636,63010.9%−20%

54San Mateo County, CACA743,56811.1%−24%

55Santa Clara County, CACA1,914,39112.0%−27%

56San Francisco County, CACA826,07913.0%−21%

57Yolo County, CACA224,41013.7%−14%

58Marin County, CACA253,69417.0%−17%

SHOWING 1–58 OF 58

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