Illinois - Architectural style - Neoclassical architecture
| 42nd Precinct Police Station |
| Adams Building |
| Adler, David, Estate |
| American State Bank |
| Atlanta Public Library |
| Ayer Public Library |
| Barber, Henry D., House |
| Beatty, Ross, House |
| Beecher Mausoleum |
| Belmont-Sheffield Trust and Savings Bank Building |
| Best Building |
| Beta Theta Pi Fraternity House |
| Biograph Theater Building |
| Broadview Hotel |
| Burnham Athenaeum |
| Carling Hotel |
| Chicago, Burlington & Quincy Railroad Depot |
| Chicago Public Library, Central Building |
| Chicago Telephone Company Kedzie Exchange |
| Chippiannock Cemetery |
| Clay County Courthouse |
| Collinsville Masonic Temple Lodge #712 A.F. & A.M. |
| Connor House |
| Continental and Commercial National Bank |
| Cook Memorial Library |
| Copley, Col. Ira C., Mansion |
| Covent Hotel |
| Crane Company Building |
| Curtis, Elijah P., House |
| Curtiss-Wright Aeronautical University Building |
| Davis Theater |
| Deerpath Inn |
| Ebenezer Missionary Baptist Church |
| Eldorado City Hall |
| Elgin National Watch Company Observatory |
| Fire Barn 5 |
| Flamingo-On-The-Lake Apartments |
| Forum, The |
| Fountain Plaza Apartments |
| France Hotel |
| Franklin County Jail |
| Freeman-Brewer-Sawyer House |
| Glen Carbon Village Hall and Firehouse |
| Grafton Bank |
| Greeley, Dr. Paul W. and Eunice, House |
| Greenville Public Library |
| Harrisburg City Hall |
| Havana Public Library |
| Henson House |
| Herget, Carl, Mansion |
| Hinman Apartments |
| Hoopeston Carnegie Public Library |
| Hotel Del Prado |
| Hotel Stratford |
| Illinois Central Railroad Depot |
| Inman Hotel |
| Jackson County Courthouse |
| Jackson Shore Apartments |
| Joliet, Louis, Hotel |
| Kewanee Hotel |
| Kewanee Public Library |
| Lamoine Hotel |
| Lewis, John W., House |
| Lincoln Branch Peoria Public Library |
| Lincoln Building |
| Lincoln Public Library |
| Litchfield Elks Lodge No. 654 |
| Madison Theatre |
| Marseilles Hydro Plant |
| Marshall Hotel |
| Masonic Temple |
| McAuley School District No. 27 |
| McLean County Courthouse and Square |
| Moultrie County Courthouse |
| Murphysboro Elks Lodge |
| New Orpheum Theatre |
| Odell Building |
| O'Grady, Mr. J. William de Coursey, House |
| Olney Carnegie Library |
| Orchestra Hall |
| Paddock, Colonel George H., House |
| Paris Carnegie Public Library |
| Passionist Fathers Monastery |
| Paxton Carnegie Public Library |
| Polish Roman Catholic Union of America |
| Polo Independent Order of Odd Fellows Lodge No. 197 |
| Price/Wheeler House |
| Proctor, John C., Recreation Center |
| Rippon-Kinsella House |
| Robertson, John, Jr., House |
| Rockford Morning Star Building |
| Rockford Woman’s Club |
| Root-Badger House |
| Soldiers and Sailors Memorial Hall |
| South Side Community Art Center |
| State Bank Building |
| St. Nicholas Hotel |
| Stony Island Trust and Savings Bank Building |
| Strand Hotel |
| Streator Public Library |
Data from United States Park Service and Wikidata
