RANKING · 2024 ACS · 58 SHOWN OF 58

Largest households, California counties

California counties ranked by average household size (2024 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide. The median across all 58 is 2.75. Biggest climber in the top 100 since 2020: Trinity County, CA, up 32 places to #25.

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SAME RANKING BYCities States Metros ZIP codes

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01▲26Alpine County, CACA1,0433.61+26%

02▼1Imperial County, CACA181,4113.49+4%

03Madera County, CACA167,9273.41+3%

04▲2Merced County, CACA297,2603.32−1%

05Tulare County, CACA485,1463.30−1%

06▼4San Benito County, CACA70,0823.25+4%

07▼3San Bernardino County, CACA2,224,0913.20−3%

08▲1San Joaquin County, CACA823,8153.19+4%

09▲3Kings County, CACA154,3273.17−4%

10▼2Monterey County, CACA433,7293.16+1%

11▼4Riverside County, CACA2,544,9163.15+1%

12▼2Kern County, CACA927,0683.12−1%

13Stanislaus County, CACA557,7193.08+1%

14▼3Fresno County, CACA1,035,4563.07−2%

15▲3Sutter County, CACA98,7872.940%

16▼2Ventura County, CACA830,8512.94−3%

17▲3Yuba County, CACA88,6912.90−1%

18▲1Colusa County, CACA21,8362.89−1%

19▲12Glenn County, CACA28,1412.880%

20▼5Orange County, CACA3,149,5072.87−3%

21▼5Santa Clara County, CACA1,914,3912.82−1%

22▼5Los Angeles County, CACA9,694,9342.81−5%

23▲2Santa Barbara County, CACA442,0652.810%

24▼2Solano County, CACA455,3762.80−2%

25▲32Trinity County, CACA15,7202.79+26%

26▼3Contra Costa County, CACA1,170,0702.78+1%

27▼6San Mateo County, CACA743,5682.76+1%

28▲2Sacramento County, CACA1,618,4602.75+2%

29▼1Yolo County, CACA224,4102.75+2%

30▼6San Diego County, CACA3,282,2482.72−1%

31▼5Alameda County, CACA1,636,6302.70−1%

32▼3Napa County, CACA132,9492.63+1%

33▲2Placer County, CACA442,0812.62+2%

34▲6Del Norte County, CACA26,4102.60+2%

35▼2Santa Cruz County, CACA258,8522.58−2%

36▲3Tehama County, CACA64,6652.58−1%

37▲15Lassen County, CACA28,1172.57+8%

38▲5Mendocino County, CACA88,1222.53+2%

39▼2El Dorado County, CACA192,3232.50−4%

40▲4Shasta County, CACA181,6482.50−1%

41▲1Lake County, CACA67,7722.49−2%

42▼4Sonoma County, CACA486,4442.49−1%

43▼9Calaveras County, CACA46,6052.48+2%

44▲6Modoc County, CACA8,4262.46+6%

45▲1Marin County, CACA253,6942.44+5%

46▼5San Luis Obispo County, CACA282,3672.430%

47▼11Butte County, CACA209,2112.42−3%

48▼3Humboldt County, CACA131,6472.370%

49▲5Plumas County, CACA18,5832.37+18%

50▼3Nevada County, CACA101,9112.360%

51▼3Amador County, CACA41,8762.35+2%

52▲4Inyo County, CACA18,1582.25−3%

53▲2Tuolumne County, CACA53,1602.25−1%

54▼1Siskiyou County, CACA42,0132.23+2%

55▼6San Francisco County, CACA826,0792.21−4%

56▼24Mono County, CACA12,5052.20−16%

57▼6Sierra County, CACA3,0982.17−7%

58Mariposa County, CACA16,9181.99−13%

SHOWING 1–58 OF 58

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