NOTE: Gray indicates insufficient data or a suppressed estimate.
Ohio's youngest zip codes cluster conspicuously around major university towns—Athens (Ohio University), Oxford (Miami University), and portions of Columbus and Columbus-adjacent areas near Ohio State—where median ages dip below 25. Suburban and exurban rings surrounding Cleveland, Columbus, Cincinnati, and Dayton tend toward median ages in the 40–50 range, while scattered rural zip codes in the northwestern and southern portions of the state skew older, reaching into the mid-50s and above. The Lake Erie shoreline communities in the north show notable variability, with retirement-oriented areas appearing in yellow alongside younger urban cores in dark blue within the Cleveland and Toledo metros.
Data: U.S. Census Bureau, 2023 ACS
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- U.S. Citizens (% of Population Over 18) by Zip Code (ZCTA5) — Ohio
- High School Graduate (% of Over 25) by Zip Code (ZCTA5) — Ohio
- Population Non-Hispanic White % by Zip Code (ZCTA5) — Ohio
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- Population Non-Hispanic American Indian % by Zip Code (ZCTA5) — Ohio
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