NOTE: Gray indicates insufficient data or a suppressed estimate.
Northern Maine's interior and unorganized territories display notably low household sizes, with many zip codes in Aroostook and Piscataquis counties falling below 2.0 persons per household, likely reflecting aging rural populations. A clear contrast emerges in the southern and central-western regions, where zip codes in areas such as western Oxford and Franklin counties trend toward higher average household sizes in the 2.5–3.0+ range, suggesting younger families and more suburban demographics. Several small pockets of very low household size (below 1.8) appear along the southern coast and in college-town areas, consistent with concentrations of single-person households, student populations, or retirement communities.
Data: U.S. Census Bureau, 2023 ACS
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