Illinois - Area of significance: Politics/Government
| 7th District Police Station |
| Addams, John H., Homestead |
| Allen, Willis, House |
| Altgeld Gardens–Philip Murray Homes Historic District |
| Alton Chapter House |
| Andover Chapter House |
| Annawan Chapter House |
| Appellate Court, 5th District |
| Arsenal Courts Historic District |
| Beach, Thomas A., House |
| Beecher Hall, Illinois College |
| Berwyn Health Center |
| Bethalto Village Hall |
| Blackstone Hotel |
| Bloomingdale School-Village Hall |
| Bloomington Central Business District |
| Bryant, Francis E., House |
| Bryan, William Jennings, Boyhood Home |
| Cairo Historic District |
| Caldwell Farmstead |
| Calhoun, Mr. James Kent, House |
| Camptown Town Hall |
| Carlinville Chapter House |
| Carmi Chapter House |
| Carrollton Courthouse Square Historic District |
| Carthage Courthouse Square Historic District |
| Cermak, Anton, House |
| Champaign Downtown Commercial District |
| Chicago Federal Center |
| Christian Hill Historic District |
| City and Town Hall |
| City Building |
| Clayville Tavern |
| Clover Lawn |
| Coles County Courthouse |
| Collinsville City Hall and Fire Station |
| Cook County Criminal Court Building |
| Cumberland County Courthouse |
| Dawes, Charles Gates, House |
| De Priest, Oscar Stanton, House |
| Dewey House |
| Dilg, Herbert A., House |
| Douglas Tomb State Memorial |
| Downtown Aledo Historic District |
| Downtown Joliet Historic District |
| Downtown Rock Island Historic District |
| Downtown Urbana Historic District |
| Duncan, Joseph, House |
| Du Page County Courthouse |
| Dupont, John, House |
| Edgar County Courthouse |
| Edwardsville Chapter House |
| Effingham County Courthouse |
| Eldorado City Hall |
| Elgin Academy |
| Executive Mansion |
| Fairbury City Hall |
| Fire Barn 5 |
| Fithian House |
| Foley, Jennie, Building |
| Fort Massac Site |
| Forum, The |
| Gale, Judge Jacob, House |
| Galena Historic District |
| Glen Carbon Village Hall and Firehouse |
| Gold Coast Historic District |
| Graham, Cong. James M., House |
| Grant, Ulysses S., House |
| Griggs, Clark R., House |
| Gross Point Village Hall |
| Hamilton, John M., House |
| Harrisburg City Hall |
| Hennepin Canal Historic District |
| Henry County Courthouse |
| Hickox, Virgil, House |
| Hines, Edward Jr., Veterans Administration Hospital Historic District |
| Hodges House |
| Humphrey, John, House |
| Hunt House |
| Illinois State Penitentiary-Joliet Historic District |
| Illinois State Police Office, Pontiac |
| Jackson County Courthouse |
| Jacksonville Historic District |
| Jersey County Courthouse |
| Jerseyville Downtown Historic District |
| Johnson County Courthouse |
| Kankakee County Courthouse |
| Kendall County Courthouse |
| King, Patrick J., House |
| Knox County Courthouse and Hall of Records |
| Knox County Jail |
| Koerner, Gustave, House |
| LaHarpe City Hall |
| LaSalle City Building |
| Lawrence County Courthouse |
| Lebanon Historic District |
| Lena Water Tower |
| Lewis, John L., House |
| Lewis, John W., House |
| Libertyville Downtown Historic District |
Data from United States Park Service and Wikidata
