NOTE: Gray indicates insufficient data or a suppressed estimate.
The lowest median ages in the Boston metro cluster tightly around the core Boston zip codes—particularly near the university-dense areas of Allston, Brighton, and the Fenway—where median ages dip below 25, reflecting large student populations. Suburban and exurban zip codes to the northwest and south, including parts of Newton, Waltham, and Weymouth, trend notably older with median ages in the 38–50 range. The most striking outliers are the bright yellow coastal zip codes near Lynn and Hull, where median ages exceed 55, standing in sharp contrast to the younger urban core just miles away.
Data: U.S. Census Bureau, 2023 ACS
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