Bond County
Boone County
| Belvidere North State Street Historic District | |
| Belvidere South State Street Historic District | |
| Belvidere High School | |
| Lampert-Wildflower House | |
| Pettit Memorial Chapel | |
| United States Post Office-Belvidere |
Brown County
Cass County
Christian County
| Bolivia Road Bridge | |
| Illinois State Bank Building | |
| Louis Jehle House | |
| Kitchell Park | |
| Taylorville Chautauqua Auditorium | |
| Taylorville Courthouse Square Historic District |
Clay County
| Baltimore and Ohio Railroad Depot | |
| Clay County Courthouse | |
| Clay County Jail | |
| Pearl and Bess Meyer House | |
| Paine House | |
| Shriver House |
Clinton County
Cumberland County
DeWitt County
Douglas County
Edwards County
Effingham County
Fayette County
Ford County
| Dunnan-Hampton House | |
| Paxton Carnegie Public Library | |
| Paxton First Schoolhouse | |
| Paxton Water Tower and Pump House | |
| Alfred Phillips House |
Franklin County
Hamilton County
| Cloud State Bank | |
| Aaron G. Cloud House | |
| Chalon Guard and Emma Blades Cloud House | |
| St. James Episcopal Church |
Hardin County
Henderson County
| Lock and Dam No. 18 Historic District | |
| Oquawka Wagon Bridge | |
| Alexis Phelps House | |
| South Henderson Church and Cemetery |
Iroquois County
| Glenwood School | |
| Old Iroquois County Courthouse | |
| Prairie Dell Meetinghouse | |
| A. Herr and E. E. Smith Public Library | |
| St. Mary's Church | |
| Watseka Union Depot |
Jasper County
Jefferson County
Johnson County
| John Bridges Tavern and Store Site | |
| John Dupont House | |
| Johnson County Courthouse | |
| Vienna Public Library |
Lawrence County
Marshall County
Mason County
Massac County
Menard County
| Lincoln's New Salem Village | |
| North Sangamon United Presbyterian Church | |
| Petersburg Historic District | |
| Robinson-Bonnett Inn | |
| Col. Matthew Rogers Building |
Moultrie County
Perry County
Piatt County
| Robert Allerton Estate | |
| Francis E. Bryant House | |
| Monticello Courthouse Square Historic District | |
| North State Street Historic District | |
| South Charter Street Historic District | |
| Voorhies Castle |
Pope County
Pulaski County
| Illinois Central Railroad Depot | |
| Mound City Civil War Naval Hospital | |
| Mound City National Cemetery | |
| Olmstead Depot |
Putnam County
Richland County
Saline County
| Carrier Mills Archeological District | |
| Eldorado City Hall | |
| Harrisburg City Hall | |
| Saline County Poor Farm |
Schuyler County
Scott County
Shelby County
| Chautauqua Auditorium | |
| Clarksburg Schoolhouse | |
| Shelbyville Historic District | |
| Horace M. Tallman House | |
| Thompson Mill Covered Bridge | |
| Westervelt Christian Church |
Stark County
Wabash County
Washington County
Wayne County
Williamson County