RANKING · 2010 CENSUS · 58 SHOWN OF 58

Largest senior population, California counties · 2010

California counties home to the most residents aged 65 and over as of 2010. Ranked by number of people, not the senior share. This list covers the 58 counties in California that qualify, ranked against each other statewide.

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Los Angeles County, CACA9,694,9341,065,699+15%

02San Diego County, CACA3,282,248351,425+12%

03Orange County, CACA3,149,507349,677+25%

04Riverside County, CACA2,544,916258,586+32%

05Santa Clara County, CACA1,914,391196,944+23%

06San Bernardino County, CACA2,224,091181,348+24%

07Alameda County, CACA1,636,630167,746+14%

08Sacramento County, CACA1,618,460158,551+17%

09Contra Costa County, CACA1,170,070130,438+22%

10San Francisco County, CACA826,079109,842+4%

11Ventura County, CACA830,85196,309+25%

12San Mateo County, CACA743,56896,262+9%

13Fresno County, CACA1,035,45693,421+18%

14Kern County, CACA927,06875,437+22%

15San Joaquin County, CACA823,81571,181+19%

16Sonoma County, CACA486,44467,364+16%

17Stanislaus County, CACA557,71954,831+17%

18Santa Barbara County, CACA442,06554,398+7%

19Placer County, CACA442,08153,562+65%

20Solano County, CACA455,37646,847+25%

21Monterey County, CACA433,72944,422+10%

22Marin County, CACA253,69442,192+26%

23Tulare County, CACA485,14641,779+16%

24San Luis Obispo County, CACA282,36741,022+15%

25Butte County, CACA209,21133,817+5%

26Shasta County, CACA181,64829,967+21%

27Santa Cruz County, CACA258,85229,158+14%

28El Dorado County, CACA192,32326,524+37%

29Merced County, CACA297,26023,960+20%

30Napa County, CACA132,94920,594+8%

31Yolo County, CACA224,41019,771+25%

32Nevada County, CACA101,91119,174+19%

33Imperial County, CACA181,41118,152+27%

34Humboldt County, CACA131,64717,725+12%

35Madera County, CACA167,92717,262+27%

36Mendocino County, CACA88,12213,493+15%

37Kings County, CACA154,32712,030+26%

38Sutter County, CACA98,78711,990+23%

39Lake County, CACA67,77211,440+1%

40Tuolumne County, CACA53,16011,294+12%

41Tehama County, CACA64,66510,071+13%

42Calaveras County, CACA46,6059,565+30%

43Siskiyou County, CACA42,0138,782+9%

44Amador County, CACA41,8767,865+24%

45Yuba County, CACA88,6917,255+13%

46San Benito County, CACA70,0825,360+24%

47Plumas County, CACA18,5834,154+12%

48Del Norte County, CACA26,4103,873+12%

49Mariposa County, CACA16,9183,821+30%

50Glenn County, CACA28,1413,737+9%

51Inyo County, CACA18,1583,535+3%

52Lassen County, CACA28,1173,474+14%

53Trinity County, CACA15,7202,769+24%

54Colusa County, CACA21,8362,495+17%

55Modoc County, CACA8,4261,905+15%

56Mono County, CACA12,5051,377+41%

57Sierra County, CACA3,098676+7%

58Alpine County, CACA1,043166+38%

SHOWING 1–58 OF 58

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS