Every NPS unit in Illinois.
Illinois's 8 NPS units: 3 National Historic Trails · 2 National Historic Sites · 2 National Monuments · 1 National Historical Park. Combined 5-year-average annual visits: 165,906 (multi-state units count their full visits in every state they touch — see methodology). The most-visited unit is Lincoln Home National Historic Site at about 134K annual visits.
| Unit | Designation | 5-yr avg visits | Busiest month |
|---|---|---|---|
| Lincoln Home National Historic Site | National Historic SiteLIHO | 134,419 | July |
| Pullman National Historical Park | National Historical ParkPULL | 27,849 | July |
| Emmett Till and Mamie Till-Mobley National Monument | National MonumentTILL | 3,638 | June |
| Lewis & Clark National Historic Trail | National Historic TrailLECL | — | — |
| Mormon Pioneer National Historic Trail | National Historic TrailMOPI | — | — |
| New Philadelphia National Historic Site | National Historic SiteNEPH | — | — |
| Springfield 1908 Race Riot National Monument | National MonumentSPRA | — | — |
| 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.