RANKING · 2020 CENSUS · 58 SHOWN OF 58

Highest Medicaid coverage, California counties · 2020

California counties ranked by the share of people covered by Medicaid or other means-tested public insurance, alone or in combination with other coverage (2020 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

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPMEDICAIDVS –

01Imperial County, CACA181,41146.9%–

02Merced County, CACA297,26042.8%–

03Tulare County, CACA485,14642.1%–

04Madera County, CACA167,92741.0%–

05Lake County, CACA67,77240.7%–

06Del Norte County, CACA26,41039.4%–

07Kern County, CACA927,06839.3%–

08Fresno County, CACA1,035,45638.9%–

09Tehama County, CACA64,66535.9%–

10Mendocino County, CACA88,12235.7%–

11Colusa County, CACA21,83634.5%–

12Glenn County, CACA28,14134.5%–

13Stanislaus County, CACA557,71934.0%–

14Sutter County, CACA98,78733.7%–

15Yuba County, CACA88,69133.6%–

16Kings County, CACA154,32733.4%–

17Humboldt County, CACA131,64732.6%–

18San Joaquin County, CACA823,81532.4%–

19San Bernardino County, CACA2,224,09132.4%–

20Siskiyou County, CACA42,01332.3%–

21Trinity County, CACA15,72032.3%–

22Butte County, CACA209,21130.8%–

23Monterey County, CACA433,72930.4%–

24Los Angeles County, CACA9,694,93429.0%–

25Riverside County, CACA2,544,91628.4%–

26Sacramento County, CACA1,618,46028.2%–

27Shasta County, CACA181,64827.9%–

28Modoc County, CACA8,42626.6%–

29Mariposa County, CACA16,91825.9%–

30Alpine County, CACA1,04325.8%–

31San Benito County, CACA70,08225.8%–

32Plumas County, CACA18,58325.2%–

33Santa Barbara County, CACA442,06524.5%–

34Lassen County, CACA28,11724.3%–

35Calaveras County, CACA46,60522.3%–

36Yolo County, CACA224,41022.2%–

37Amador County, CACA41,87621.4%–

38Solano County, CACA455,37621.2%–

39Inyo County, CACA18,15821.1%–

40Santa Cruz County, CACA258,85220.9%–

41Ventura County, CACA830,85120.7%–

42Orange County, CACA3,149,50720.6%–

43Tuolumne County, CACA53,16020.6%–

44San Diego County, CACA3,282,24820.2%–

45Nevada County, CACA101,91119.9%–

46Alameda County, CACA1,636,63019.2%–

47Sonoma County, CACA486,44418.5%–

48Contra Costa County, CACA1,170,07018.3%–

49San Francisco County, CACA826,07918.0%–

50Sierra County, CACA3,09817.7%–

51Napa County, CACA132,94917.6%–

52El Dorado County, CACA192,32317.1%–

53San Luis Obispo County, CACA282,36717.0%–

54Santa Clara County, CACA1,914,39116.3%–

55Mono County, CACA12,50514.4%–

56San Mateo County, CACA743,56814.3%–

57Placer County, CACA442,08113.8%–

58Marin County, CACA253,69412.9%–

SHOWING 1–58 OF 58

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS