NOTE: Gray indicates insufficient data or a suppressed estimate.
Northern New Hampshire, particularly the areas near the Canadian border, exhibits the highest median ages in the state, with several zip codes exceeding 55–60 years, likely reflecting aging rural communities with limited economic opportunities for younger residents. The southeastern and south-central portions of the state display notably lower median ages, with a few zip codes dipping below 25—consistent with college-town demographics such as Durham (UNH) and Hanover (Dartmouth). A broad band of moderate median ages (40–50) runs through the central corridor, while scattered pockets of younger populations in the western midsection suggest the presence of smaller institutional or employment centers.
Data: U.S. Census Bureau, 2023 ACS
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