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.

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

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

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

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

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

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

06San 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%

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

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

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

13Fresno 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%

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

19Stanislaus 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%

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

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

32Napa 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%

38Lake County, CACA67,77216,290+43%

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

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

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

42Tehama 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%

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

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

51Glenn County, CACA28,1414,893+43%

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

53Inyo 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%

SHOWING 1–58 OF 58

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES