Every NPS unit in Missouri.
Missouri's 14 NPS units: 7 National Historic Trails · 2 National Historic Sites · 1 National Monument · 1 National Park · 1 National Scenic Riverways · 1 National Historical Park · 1 National Battlefield. Combined 5-year-average annual visits: 3,703,142 (multi-state units count their full visits in every state they touch — see methodology). The most-visited unit is Gateway Arch National Park at about 1.99M annual visits.
| Unit | Designation | 5-yr avg visits | Busiest month |
|---|---|---|---|
| Gateway Arch National Park | National ParkJEFF | 1,991,754 | July |
| Ozark National Scenic Riverways | National Scenic RiverwaysOZAR | 1,282,966 | July |
| Wilson's Creek National Battlefield | National BattlefieldWICR | 319,858 | August |
| Ulysses S Grant National Historic Site | National Historic SiteULSG | 35,088 | July |
| George Washington Carver National Monument | National MonumentGWCA | 32,598 | March |
| Harry S Truman National Historic Site | National Historic SiteHSTR | 20,669 | July |
| Ste. Geneviève National Historical Park | National Historical ParkSTGE | 20,209 | August |
| Butterfield Overland National Historic Trail | National Historic TrailBUOV | — | — |
| California National Historic Trail | National Historic TrailCALI | — | — |
| Lewis & Clark National Historic Trail | National Historic TrailLECL | — | — |
| Oregon National Historic Trail | National Historic TrailOREG | — | — |
| Pony Express National Historic Trail | National Historic TrailPOEX | — | — |
| Santa Fe National Historic Trail | National Historic TrailSAFE | — | — |
| Trail Of Tears National Historic Trail | National Historic TrailTRTE | — | — |
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.