Household Average Size by Zip Code (ZCTA5) — Chicago Metro

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Household sizes in the Chicago metro skew largest—frequently exceeding 3.0 persons—in suburban and exurban zip codes to the west and southwest, particularly around Aurora, Elgin, and Cicero, where multigenerational and larger family households are more common. The Loop and the lakefront corridor running north through Evanston register the smallest averages, often below 2.0, reflecting the concentration of single-occupant and couple households in dense, transit-oriented urban cores. A notable contrast exists within the city itself, where south and west side neighborhoods like Englewood maintain moderately higher household sizes compared to the adjacent downtown and near-north areas just a few miles away.

Data: U.S. Census Bureau, 2023 ACS

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