RANKING · 2024 ACS · 58 SHOWN OF 58

Highest Medicare coverage, California counties

California counties ranked by the share of people covered by Medicare, alone or in combination with other coverage (2024 ACS). A close proxy for retirement geography. This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 18.7%. Biggest climber in the top 100 since 2020: Plumas County, CA, up 8 places to #2.

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR2020 2024

RANKPLACESTATEPOPMEDICAREVS 2020

01▲2Sierra County, CACA3,09837.9%+6.6 pts

02▲8Plumas County, CACA18,58333.0%+3.8 pts

03▲5Modoc County, CACA8,42632.6%+3.0 pts

04▼2Trinity County, CACA15,72031.6%−0.8 pts

05Tuolumne County, CACA53,16031.6%+1.0 pts

06▼2Mariposa County, CACA16,91831.3%+0.2 pts

07▼6Amador County, CACA41,87630.9%−1.5 pts

08▼2Calaveras County, CACA46,60530.5%+0.2 pts

09Nevada County, CACA101,91130.4%+1.1 pts

10▲1Siskiyou County, CACA42,01330.2%+1.4 pts

11▲1Lake County, CACA67,77227.5%−0.7 pts

12▲1Inyo County, CACA18,15826.9%+1.4 pts

13▲7Del Norte County, CACA26,41026.0%+3.6 pts

14▲1Mendocino County, CACA88,12225.8%+2.2 pts

15▲3El Dorado County, CACA192,32324.4%+1.5 pts

16▼2Shasta County, CACA181,64824.3%+0.4 pts

17▲2Marin County, CACA253,69423.5%+1.0 pts

18▼2Tehama County, CACA64,66523.0%−0.4 pts

19▼2Lassen County, CACA28,11722.9%−0.3 pts

20▲1San Luis Obispo County, CACA282,36722.9%+1.8 pts

21▲2Humboldt County, CACA131,64722.6%+2.0 pts

22▲2Sonoma County, CACA486,44422.3%+1.8 pts

23▲3Napa County, CACA132,94921.4%+1.7 pts

24▲1Placer County, CACA442,08120.9%+0.7 pts

25▼3Butte County, CACA209,21120.3%−0.3 pts

26▼19Alpine County, CACA1,04320.0%−9.7 pts

27▲1Santa Cruz County, CACA258,85219.3%+1.7 pts

28▼1Glenn County, CACA28,14118.9%−0.2 pts

29Solano County, CACA455,37618.7%+1.6 pts

30▲8Mono County, CACA12,50518.0%+2.0 pts

31Sutter County, CACA98,78718.0%+1.2 pts

32▲1Ventura County, CACA830,85118.0%+1.5 pts

33▲2San Francisco County, CACA826,07917.7%+1.6 pts

34▼2Contra Costa County, CACA1,170,07017.4%+0.9 pts

35▲5San Mateo County, CACA743,56817.3%+1.4 pts

36Santa Barbara County, CACA442,06517.2%+1.1 pts

37▲2Madera County, CACA167,92716.8%+0.9 pts

38▲6Colusa County, CACA21,83616.6%+1.2 pts

39▼2Yuba County, CACA88,69116.6%+0.5 pts

40▲6Orange County, CACA3,149,50716.4%+1.3 pts

41▲4San Diego County, CACA3,282,24816.4%+1.1 pts

42Riverside County, CACA2,544,91616.3%+0.7 pts

43▼2Sacramento County, CACA1,618,46016.3%+0.6 pts

44▲4Monterey County, CACA433,72915.7%+1.3 pts

45▲4Alameda County, CACA1,636,63015.5%+1.3 pts

46▼3Imperial County, CACA181,41115.5%0.0 pts

47▲3Los Angeles County, CACA9,694,93415.5%+1.3 pts

48▼1Stanislaus County, CACA557,71915.1%+0.3 pts

49▲3San Benito County, CACA70,08214.6%+0.9 pts

50▲4Santa Clara County, CACA1,914,39114.5%+0.9 pts

51San Joaquin County, CACA823,81514.4%+0.5 pts

52▲1Fresno County, CACA1,035,45614.0%+0.4 pts

53▲5Yolo County, CACA224,41013.9%+1.1 pts

54▲1San Bernardino County, CACA2,224,09113.8%+0.8 pts

55▲1Kern County, CACA927,06813.5%+0.7 pts

56▲1Merced County, CACA297,26013.4%+0.6 pts

57▼27Tulare County, CACA485,14613.3%−3.6 pts

58▼24Kings County, CACA154,32712.9%−3.4 pts

SHOWING 1–58 OF 58

Download CSV (full list, 58 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES