Largest households, US counties
US counties ranked by average household size (2024 ACS). Oglala Lakota County, South Dakota leads at 4.46. 3,144 counties qualify in total. Texas carries 7 of the top 25 entries. The median across all 3,144 is 2.43. Biggest climber in the top 100 since 2020: Cimarron County, OK, up 2,607 places to #62.
UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES
Frequently asked
Which county has the highest average household size?
Oglala Lakota County, South Dakota ranks #1 with 4.46 (2024 American Community Survey).
What are the top 5 counties by average household size?
Oglala Lakota County, South Dakota, Kusilvak Census Area, Alaska, Northwest Arctic, Alaska, Wheeler County, Georgia, Jim Hogg County, Texas.
How many counties are in this ranking?
3,144 counties qualify after filtering for population minimums and data availability. The ranking covers 2024 ACS 5-year data.
How is average household size measured?
Average number of people per household. Source: US Census Bureau, American Community Survey 5-year estimates (2024).