Illinois - Area of significance: Transportation
| Airtight Bridge |
| Alternate Route 66, Wilmington to Joliet |
| Ambler's Texaco Gas Station |
| Amboy Illinois Central Depot |
| Ardmore Avenue Train Station |
| Ariston Cafe |
| Armour's Warehouse |
| Babylon Bend Bridge |
| Baltimore and Ohio Railroad Depot |
| Beecher Mausoleum |
| Belvidere Cafe, Motel and Gas Station |
| Bernadotte Bridge |
| Black's Store |
| Blakeman Bridge |
| Brandon Road Lock and Dam Historic District |
| Buckeye Bridge |
| Cairo Historic District |
| Central Geneva Historic District |
| Chain of Rocks Bridge |
| Champaign Downtown Commercial District |
| Chicago and Eastern Illinois Railroad Depot |
| Chicago and Northwestern Depot |
| Chicago and Northwestern Depot |
| Chicago and North Western Railroad Depot |
| Chicago and North Western Railway Power House |
| Chicago, Burlington, and Quincy Railroad Depot |
| Chicago, Burlington, and Quincy Railroad Depot |
| Chicago, Burlington & Quincy Railroad Depot |
| Chicago, Burlington & Quincy Railroad Depot |
| Chicago, Burlington & Quincy Railroad Station |
| Chicago Great Western Railroad Depot |
| Chicago, Milwaukee and St. Paul Railway Passenger Depot |
| Chicago & North Western Railway Stone Arch Bridge |
| Chicago Portage National Historic Site |
| Chicago, Rock Island and Pacific Railroad Depot |
| Chicago Sanitary and Ship Canal Historic District |
| Clayville Tavern |
| Coleman Hardware Company Building |
| Dearborn Station |
| Dell Rhea's Chicken Basket |
| Douglas Tomb State Memorial |
| Downtown Aledo Historic District |
| Downtown Joliet Historic District |
| Downtown Plainfield Historic District |
| Downtown Rock Island Historic District |
| Dresden Island Lock and Dam Historic District |
| Duncan Mills Bridge |
| Dwight Chicago and Alton Railroad Depot |
| Eagle Hotel |
| Elsah Historic District |
| Fall Creek Stone Arch Bridge |
| Ford Airport Hanger |
| Galena Historic District |
| General Dean Suspension Bridge |
| Golconda Historic District |
| Grafton Historic District |
| Great Western Railroad Depot |
| Griggs, Clark R., House |
| Grossdale Station |
| Grosse Point Light Station |
| Hawes, J. H., Elevator |
| Hennepin Canal Historic District |
| Hotel Arthur |
| Hyde Park-Kenwood Historic District |
| Illinois and Michigan Canal |
| Illinois Central Railroad and Toledo, Peoria, and Western Railroad Freight House |
| Illinois Central Railroad Depot |
| Illinois Central Railroad Depot |
| Illinois Central Railroad Depot |
| Illinois Central Railroad Passenger Depot |
| Illinois Central Railroad Water Tower and Pump House |
| Illinois Central Stone Arch Railroad Bridges |
| Illinois State Police Office, Pontiac |
| Illinois Traction Building |
| Illinois Traction System Mackinaw Depot |
| Illinois Waterway Project Office |
| Indian Ford Bridge |
| Joliet Municipal Airport |
| La Grange Lock and Dam Historic District |
| Lake Bluff Uptown Commercial Historic District |
| Lazy A Motel |
| Linden Avenue Terminal |
| Lock and Dam No. 13 Historic District |
| Lock and Dam No. 15 Historic District |
| Lock and Dam No. 17 Historic District |
| Lock and Dam No. 18 Historic District |
| Lock and Dam No. 21 Historic District |
| Lockport Lock, Dam and Power House Historic District |
| London Mills Bridge |
| Louisville and Nashville Depot |
| Lou Mitchell's Restaurant |
| Macktown Historic District |
| Marseilles Hydro Plant |
| Marseilles Lock and Dam Historic District |
| Mary's River Covered Bridge |
| Milne, Robert, House |
| Mobile and Ohio Railroad Depot |
| Morris Downtown Commercial Historic District |
| Morris Wide Water Canal Boat Site |
| Murphysboro Downtown Historic District |
Data from United States Park Service and Wikidata
