Illinois - Area of significance: Commerce
| Andersonville Commercial Historic District |
| Arcade Building |
| Ariston Cafe |
| Armour, J. Ogden, House |
| Armour's Warehouse |
| Aurora Broadway Historic District |
| Ayers Bank Building |
| Bassett, Orland P., House |
| Beach, Thomas A., House |
| Beatty, Ross, House |
| Beatty, Ross J., House |
| Belmont-Sheffield Trust and Savings Bank Building |
| Belvidere Cafe, Motel and Gas Station |
| Belvidere North State Street Historic District |
| Belvidere South State Street Historic District |
| B.F. Goodrich Company Showroom |
| Bishop’s Busy Big Store-Lyric Opera House |
| Black's Store |
| Blair Historic District |
| Bloomington Central Business District |
| Broadview Hotel |
| Brooks Catsup Bottle Water Tower |
| Brussels Historic District |
| Calumet Plant, R. R. Donnelly & Sons Company |
| Carthage Courthouse Square Historic District |
| Cattle Bank |
| Central Geneva Historic District |
| Central House |
| Centralia Commercial Historic District |
| Central Springfield Historic District |
| Champaign Downtown Commercial District |
| Chicago Bee Building |
| Chicago Board of Trade Building |
| Chicago Club |
| Chicago Portage National Historic Site |
| Chicago Sanitary and Ship Canal Historic District |
| Chicago Savings Bank Building |
| Chick House |
| Cloud State Bank |
| Coca Cola Company Building |
| Colwell, E. B., and Company Department Store |
| Commercial House |
| Condon Brothers and R.H. Shumway Building |
| Conway Building |
| Country Tea Room |
| Crane Company Building |
| Creamery Package Manufacturing Company Building |
| Dearborn Station |
| Decatur Downtown Historic District |
| Deerpath Inn |
| Delavan Commercial Historic District |
| Dell Rhea's Chicken Basket |
| Denhart Bank Building |
| De Priest, Oscar Stanton, House |
| Dixon Downtown Historic District |
| Downey Building |
| Downtown Aledo Historic District |
| Downtown East St. Louis Historic District |
| Downtown Hinsdale Historic District |
| Downtown Joliet Historic District |
| Downtown Oswego Historic District |
| Downtown Peoria Historic District |
| Downtown Peotone Historic District |
| Downtown Plainfield Historic District |
| Downtown Quincy Historic District |
| Downtown Rock Island Historic District |
| Downtown Urbana Historic District |
| Du Sable, Jean Baptiste Point, Homesite |
| Dycus, Floyd and Glenora, House |
| Eagle Hotel |
| Elgin Downtown Commercial District |
| Elgin National Watch Company Observatory |
| Elgin Tower Building |
| Elsah Historic District |
| Exchange Bank |
| Flat Iron Building |
| Florsheim, Harold, House |
| Foley, Jennie, Building |
| Fort Dearborn Hotel |
| Fort Massac Site |
| Fox River House |
| France Hotel |
| Fulton Commercial Historic District |
| Galena Historic District |
| Glen Ellyn Downtown North Historic District |
| Glen Ellyn Downtown South Historic District |
| Golconda Historic District |
| Goldblatt Bros. Department Store |
| Gold Coast Historic District |
| Grafton Historic District |
| Graham-Ginestra House |
| Graue Mill |
| Gray-Watkins Mill |
| Greenup Commercial Historic District |
| Grosse Point Light Station |
| Harrer Building |
| Hawes, J. H., Elevator |
| Healy Chapel |
| Hennepin Canal Historic District |
| Home Bank and Trust Company |
Data from United States Park Service and Wikidata
