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 (1990 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 5.0%.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPGRADUATE DEGREEVS –

01Glenn County, CACA28,1412.3%–

02Kings County, CACA154,3272.5%–

03Yuba County, CACA88,6912.5%–

04Tehama County, CACA64,6652.6%–

05Colusa County, CACA21,8362.8%–

06Lake County, CACA67,7722.9%–

07Trinity County, CACA15,7203.1%–

08Del Norte County, CACA26,4103.2%–

09Modoc County, CACA8,4263.3%–

10Tulare County, CACA485,1463.5%–

11Imperial County, CACA181,4113.6%–

12Amador County, CACA41,8763.6%–

13Merced County, CACA297,2603.7%–

14Lassen County, CACA28,1173.8%–

15Sierra County, CACA3,0983.8%–

16Madera County, CACA167,9273.9%–

17Stanislaus County, CACA557,7193.9%–

18Calaveras County, CACA46,6053.9%–

19Siskiyou County, CACA42,0134.0%–

20Shasta County, CACA181,6484.1%–

21San Joaquin County, CACA823,8154.1%–

22Inyo County, CACA18,1584.1%–

23San Benito County, CACA70,0824.1%–

24Kern County, CACA927,0684.2%–

25Plumas County, CACA18,5834.3%–

26Alpine County, CACA1,0434.3%–

27Tuolumne County, CACA53,1604.5%–

28Sutter County, CACA98,7874.8%–

29Riverside County, CACA2,544,9164.9%–

30Fresno County, CACA1,035,4565.0%–

31San Bernardino County, CACA2,224,0915.2%–

32Solano County, CACA455,3765.3%–

33Mariposa County, CACA16,9185.4%–

34El Dorado County, CACA192,3235.8%–

35Mono County, CACA12,5055.8%–

36Mendocino County, CACA88,1225.9%–

37Humboldt County, CACA131,6475.9%–

38Butte County, CACA209,2116.0%–

39Nevada County, CACA101,9116.5%–

40Placer County, CACA442,0816.6%–

41Sacramento County, CACA1,618,4607.1%–

42San Luis Obispo County, CACA282,3677.4%–

43Napa County, CACA132,9497.6%–

44Monterey County, CACA433,7297.6%–

45Los Angeles County, CACA9,694,9347.8%–

46Ventura County, CACA830,8517.9%–

47Sonoma County, CACA486,4447.9%–

48San Diego County, CACA3,282,2488.8%–

49Orange County, CACA3,149,5079.1%–

50Santa Barbara County, CACA442,06510.0%–

51Santa Cruz County, CACA258,85210.4%–

52Contra Costa County, CACA1,170,07010.6%–

53Alameda County, CACA1,636,63010.9%–

54San Mateo County, CACA743,56811.1%–

55Santa Clara County, CACA1,914,39112.0%–

56San Francisco County, CACA826,07913.0%–

57Yolo County, CACA224,41013.7%–

58Marin County, CACA253,69417.0%–

SHOWING 1–58 OF 58

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS