RANKING · 2024 ACS · 58 SHOWN OF 58

Largest senior population, California counties

California counties home to the most residents aged 65 and over as of 2024. Ranked by number of people, not the senior share. This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 34,001.

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SAME RANKING BYCities States Metros

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

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Los Angeles County, CACA9,694,9341,487,700+61%

02Orange County, CACA3,149,507514,824+83%

03San Diego County, CACA3,282,248507,734+62%

04Riverside County, CACA2,544,916382,888+95%

05▲1Santa Clara County, CACA1,914,391282,010+76%

06▼1San Bernardino County, CACA2,224,091276,984+89%

07Alameda County, CACA1,636,630254,161+72%

08Sacramento County, CACA1,618,460243,370+79%

09Contra Costa County, CACA1,170,070199,270+86%

10▲1San Francisco County, CACA826,079146,510+38%

11▼1Ventura County, CACA830,851145,793+90%

12▲1San Mateo County, CACA743,568132,242+50%

13▼1Fresno County, CACA1,035,456131,488+66%

14Kern County, CACA927,068108,560+75%

15San Joaquin County, CACA823,815107,730+80%

16Sonoma County, CACA486,444104,389+80%

17Placer County, CACA442,08185,822+164%

18▲1Solano County, CACA455,37678,738+110%

19▼1Stanislaus County, CACA557,71976,271+63%

20Santa Barbara County, CACA442,06573,710+45%

21Monterey County, CACA433,72965,068+61%

22San Luis Obispo County, CACA282,36762,338+75%

23Marin County, CACA253,69461,345+83%

24Tulare County, CACA485,14657,101+59%

25Santa Cruz County, CACA258,85250,275+97%

26El Dorado County, CACA192,32345,254+134%

27Shasta County, CACA181,64839,009+57%

28Butte County, CACA209,21138,227+19%

29Merced County, CACA297,26034,001+70%

30▲2Nevada County, CACA101,91130,033+87%

31▼1Yolo County, CACA224,41029,712+88%

32▼1Napa County, CACA132,94928,455+49%

33Humboldt County, CACA131,64726,660+69%

34Imperial County, CACA181,41124,701+73%

35Madera County, CACA167,92723,148+70%

36Mendocino County, CACA88,12222,154+89%

37Kings County, CACA154,32716,584+74%

38▲1Lake County, CACA67,77216,290+43%

39▼1Sutter County, CACA98,78716,216+66%

40Tuolumne County, CACA53,16015,339+52%

41▲1Calaveras County, CACA46,60513,517+83%

42▼1Tehama County, CACA64,66513,085+47%

43Siskiyou County, CACA42,01312,101+51%

44Amador County, CACA41,87611,423+80%

45Yuba County, CACA88,69111,060+73%

46San Benito County, CACA70,0829,234+114%

47Plumas County, CACA18,5836,114+64%

48Del Norte County, CACA26,4105,552+61%

49▲1Mariposa County, CACA16,9185,073+73%

50▲1Lassen County, CACA28,1175,012+64%

51▼2Glenn County, CACA28,1414,893+43%

52▲1Trinity County, CACA15,7204,795+114%

53▼1Inyo County, CACA18,1584,675+36%

54Colusa County, CACA21,8363,410+60%

55Modoc County, CACA8,4262,722+64%

56Mono County, CACA12,5052,297+135%

57Sierra County, CACA3,098963+53%

58Alpine County, CACA1,043341+184%

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