NOTE: Gray indicates insufficient data or a suppressed estimate.
Suburban zip codes in southern New Hampshire—particularly in the Rockingham and Hillsborough County corridors near the Massachusetts border—exhibit the largest average household sizes, with several areas reaching 3.0 to 3.5 persons, consistent with family-oriented commuter communities. The northern regions, especially in Coös County, trend notably lower at 1.5 to 2.2 persons per household, reflecting aging populations and smaller rural households. Urban cores such as Manchester, Concord, and smaller college towns like Hanover and Durham also register lower averages, likely driven by higher concentrations of single-person households, renters, and student populations.
Data: U.S. Census Bureau, 2023 ACS
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