Illinois - Area of significance: Industry
| Addams, John H., Homestead |
| Alton Gas & Electric Power House |
| Barber-Colman Company Historic District |
| Best Brewing Company of Chicago Building |
| Bloomington Central Business District |
| Brown Shoe Company Factory |
| Buffalo Grove Lime Kiln |
| Campana Factory |
| Central Geneva Historic District |
| Central Manufacturing District-Original East Historic District |
| Central Manufacturing District-Pershing Road Development Historic District |
| Chicago, Burlington, and Quincy Railroad Depot |
| Christian Hill Historic District |
| Cloud State Bank |
| Coca Cola Company Building |
| Coleman Hardware Company Building |
| Crane Company Building |
| Crenshaw House |
| Curtiss-Wright Hangars 1 and 2 |
| Dawson Brothers Plant |
| Deere, John, House |
| Dundee Township Historic District |
| Ellwood Mansion |
| Galena Historic District |
| Gardner, Robert W., House |
| Glidden, Joseph F., House |
| Gold Coast Historic District |
| Grafton Boat Works |
| Graham-Ginestra House |
| Grand Tower Mining, Manufacturing and Transportation Company Site |
| Graue Mill |
| Gray-Watkins Mill |
| Gregg, William L., House |
| Griggsville Landing Lime Kiln |
| Gurler, George H., House |
| Hegeler-Carus Mansion |
| Hyde Park-Kenwood Historic District |
| Illinois Department of Mines and Minerals-Springfield Mine Rescue Station |
| Illinois Traction System Mackinaw Depot |
| Inland Steel Building |
| International Corset Company Building |
| International Tailoring Company Building |
| Joliet Steel Works |
| Kent, Sydney, House |
| King, Moses, Brick and Tile Works |
| Kirk, Col. Edward N., House |
| Lake-Peterson House |
| Lakeside Press Building |
| Lewis, John L., House |
| Malvern Roller Mill |
| Marsh, William W., House |
| Middle Avenue Historic District |
| Milk, Lemuel, Carriage House |
| Miners Institute Building |
| Mount Lookout |
| Northwestern Terra Cotta Company Building |
| Old Morrison Mill |
| Oregon Commercial Historic District |
| Otis Elevator Company Factory Building |
| Peacock Brewery |
| Peoria Cordage Company |
| Peoria Mineral Springs |
| Peoria Warehouse Historic District |
| Pilsen Historic District |
| Pope Brace Company Building |
| Post House |
| Public Service Building |
| Pullman Historic District |
| Pyle-National Company Plant |
| Reimbold, William J., House |
| Rockford Brass Works |
| Rockford Gas Light & Coke Fitting and Meter Shops Building |
| Rock Island Arsenal |
| Schoenhofen Brewery Historic District |
| Schulze Baking Company Plant |
| Sears, Albert H., House |
| Seventh Street Commercial Historic District |
| Smith, J. P., Shoe Company Plant |
| South Loop Printing House District |
| Spiegel Office Building |
| Steward, Lewis, House |
| Stolp Woolen Mill Store |
| Swedish American Telephone Company Building |
| Teich, Curt, and Company Building |
| Vassar Swiss Underwear Company Building |
| Vesta Accumulator Company Building |
| Warren, Edward Kirk, House and Garage |
| Weir, William S., Jr., House |
| Westclox Manufacturing Plant Historic District |
| Weyerhaeuser House |
| White Hall Foundry |
| Yakel House and Union Brewery |
| Ziock Building |
Data from United States Park Service and Wikidata
