RANKING · 2010 CENSUS · 57 SHOWN OF 57

Oldest housing stock, California counties · 2010

California counties ranked by oldest median year of construction (2010 ACS). This list covers the 57 counties in California that qualify, ranked against each other statewide. The median across all 57 is 1977.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01Los Angeles County, CACA9,694,93419610%

02San Mateo County, CACA743,56819630%

03Alameda County, CACA1,636,63019640%

04Marin County, CACA253,69419650%

05Humboldt County, CACA131,64719690%

06Sierra County, CACA3,09819700%

07Glenn County, CACA28,14119710%

08Modoc County, CACA8,42619710%

09Santa Cruz County, CACA258,85219710%

10Santa Barbara County, CACA442,06519710%

11Inyo County, CACA18,15819720%

12Santa Clara County, CACA1,914,39119720%

13Colusa County, CACA21,8361973+1%

14Monterey County, CACA433,72919730%

15Napa County, CACA132,94919730%

16Siskiyou County, CACA42,01319730%

17Mendocino County, CACA88,12219740%

18Orange County, CACA3,149,50719740%

19Contra Costa County, CACA1,170,07019750%

20Lassen County, CACA28,11719750%

21Ventura County, CACA830,85119750%

22Butte County, CACA209,21119760%

23Lake County, CACA67,77219760%

24Sonoma County, CACA486,44419760%

25Fresno County, CACA1,035,45619770%

26Mono County, CACA12,50519770%

27Plumas County, CACA18,58319770%

28Sacramento County, CACA1,618,46019770%

29San Diego County, CACA3,282,24819770%

30Tehama County, CACA64,66519770%

31Trinity County, CACA15,72019770%

32Yolo County, CACA224,41019770%

33Yuba County, CACA88,69119770%

34Del Norte County, CACA26,41019780%

35Shasta County, CACA181,64819780%

36Sutter County, CACA98,78719780%

37Tulare County, CACA485,14619780%

38Tuolumne County, CACA53,16019780%

39Mariposa County, CACA16,91819790%

40San Joaquin County, CACA823,8151979+1%

41Solano County, CACA455,37619790%

42Stanislaus County, CACA557,71919790%

43Amador County, CACA41,87619800%

44Kern County, CACA927,06819800%

45Merced County, CACA297,26019800%

46San Luis Obispo County, CACA282,36719800%

47San Bernardino County, CACA2,224,09119800%

48Alpine County, CACA1,04319810%

49El Dorado County, CACA192,32319810%

50Imperial County, CACA181,4111981+1%

51Nevada County, CACA101,91119810%

52Kings County, CACA154,3271982+1%

53Calaveras County, CACA46,60519830%

54Madera County, CACA167,92719830%

55San Benito County, CACA70,0821983+1%

56Riverside County, CACA2,544,9161987+1%

57Placer County, CACA442,0811989+1%

SHOWING 1–57 OF 57

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS