RANKING · 2020 CENSUS · 58 SHOWN OF 58

Largest households, California counties · 2020

California counties ranked by average household size (2020 ACS). This list covers the 58 counties in California that qualify, ranked against each other statewide.

CaliforniaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR2010 2020 2024

RANKPLACESTATEPOPAVERAGE HOUSEHOLD SIZEVS 2010

01Imperial County, CACA181,4113.73+12%

02San Benito County, CACA70,0823.33+6%

03Madera County, CACA167,9273.32+1%

04San Bernardino County, CACA2,224,0913.30+0%

05Tulare County, CACA485,1463.30−1%

06Merced County, CACA297,2603.29−2%

07Riverside County, CACA2,544,9163.26+4%

08Monterey County, CACA433,7293.25+4%

09San Joaquin County, CACA823,8153.18+4%

10Kern County, CACA927,0683.15+0%

11Fresno County, CACA1,035,4563.14+0%

12Kings County, CACA154,3273.14−5%

13Stanislaus County, CACA557,7193.09+1%

14Ventura County, CACA830,8513.06+1%

15Orange County, CACA3,149,5073.01+1%

16Santa Clara County, CACA1,914,3912.97+4%

17Los Angeles County, CACA9,694,9342.96−0%

18Sutter County, CACA98,7872.92−1%

19Colusa County, CACA21,8362.90−0%

20Yuba County, CACA88,6912.88−2%

21San Mateo County, CACA743,5682.87+6%

22Solano County, CACA455,3762.87+0%

23Contra Costa County, CACA1,170,0702.86+4%

24San Diego County, CACA3,282,2482.86+4%

25Santa Barbara County, CACA442,0652.86+2%

26Alameda County, CACA1,636,6302.84+4%

27Alpine County, CACA1,0432.83−1%

28Yolo County, CACA224,4102.82+4%

29Napa County, CACA132,9492.78+7%

30Sacramento County, CACA1,618,4602.77+3%

31Glenn County, CACA28,1412.72−6%

32Mono County, CACA12,5052.70+3%

33Santa Cruz County, CACA258,8522.70+3%

34Calaveras County, CACA46,6052.67+9%

35Placer County, CACA442,0812.66+3%

36Butte County, CACA209,2112.59+4%

37El Dorado County, CACA192,3232.58−1%

38Sonoma County, CACA486,4442.58+2%

39Tehama County, CACA64,6652.57−1%

40Del Norte County, CACA26,4102.54−1%

41San Luis Obispo County, CACA282,3672.51+3%

42Lake County, CACA67,7722.48−2%

43Mendocino County, CACA88,1222.48−0%

44Shasta County, CACA181,6482.48−2%

45Humboldt County, CACA131,6472.44+3%

46Marin County, CACA253,6942.41+3%

47Nevada County, CACA101,9112.40+2%

48Amador County, CACA41,8762.39+3%

49San Francisco County, CACA826,0792.36+2%

50Modoc County, CACA8,4262.33+0%

51Sierra County, CACA3,0982.29−2%

52Lassen County, CACA28,1172.26−5%

53Siskiyou County, CACA42,0132.24+3%

54Plumas County, CACA18,5832.21+10%

55Tuolumne County, CACA53,1602.21−3%

56Inyo County, CACA18,1582.18−6%

57Trinity County, CACA15,7202.08−6%

58Mariposa County, CACA16,9182.06−10%

SHOWING 1–58 OF 58

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