Every NPS unit in Ohio.
Ohio's 10 NPS units: 3 National Historic Sites · 2 National Historical Parks · 1 National Monument · 1 National Park · 1 National Historic Trail · 1 National Scenic Trail · 1 Memorial. Combined 5-year-average annual visits: 3,160,872 (multi-state units count their full visits in every state they touch — see methodology). The most-visited unit is Cuyahoga Valley National Park at about 2.86M annual visits.
| Unit | Designation | 5-yr avg visits | Busiest month |
|---|---|---|---|
| Cuyahoga Valley National Park | National ParkCUVA | 2,857,285 | July |
| Perry's Victory & International Peace Memorial | MemorialPEVI | 95,293 | July |
| Dayton Aviation Heritage National Historical Park | National Historical ParkDAAV | 80,761 | December |
| Hopewell Culture National Historical Park | National Historical ParkHOCU | 55,826 | July |
| James A Garfield National Historic Site | National Historic SiteJAGA | 32,735 | July |
| William Howard Taft National Historic Site | National Historic SiteWIHO | 24,956 | July |
| First Ladies National Historic Site | National Historic SiteFILA | 9,204 | July |
| Charles Young Buffalo Soldiers National Monument | National MonumentCHYO | 4,812 | July |
| Lewis & Clark National Historic Trail | National Historic TrailLECL | — | — |
| North Country National Scenic Trail | National Scenic TrailNOCO | — | — |
Methodology
Unit list and per-unit visit counts come from the official NPS Visitor Use Statistics Data Package, 2025. The "5-year average visits" column is the mean of 2021-2025 Recreation Visits. Multi-state NPS units (Yellowstone, Death Valley, Great Smoky Mountains and others) are listed under every state they touch; the per-unit visit count is the unit's total, not a per-state share. Independent site, not affiliated with the National Park Service.
Independent site. Not affiliated with or endorsed by the National Park Service. Data comes from the official NPS Visitor Use Statistics Data Package, 2025; editorial analysis is ours. The NPS Arrowhead and other NPS marks are not used.