Illinois - Role: District
| Evanston Ridge Historic District |
| Falconer Bungalow Historic District |
| Fisher-Chapman Farmstead |
| Fort Sheridan Historic District |
| Franklin Square |
| Frank Lloyd Wright-Prairie School of Architecture Historic District |
| French Colonial Historic District |
| Fuller Park |
| Fulton Commercial Historic District |
| Gage Park Bungalow Historic District |
| Galena Historic District |
| Galesburg Historic District |
| Garden Homes Historic District |
| Garfield Farm and Tavern |
| Garfield Park |
| Garrison-Coronado-Haskill Historic District |
| Gillson Park and Wilmette Harbor Historic District |
| Glen Ellyn Downtown North Historic District |
| Glen Ellyn Downtown South Historic District |
| Glen Ellyn Main Street Historic District |
| Golconda Historic District |
| Gold Coast Historic District |
| Graceland Cemetery |
| Grafton Historic District |
| Grand Crossing Park |
| Grand View Drive |
| Grant Park |
| Great Lakes Naval Training Station |
| Green Bay Road Historic District |
| Greenup Commercial Historic District |
| Griggsville Historic District |
| Gunderson Historic District |
| Haight Village Historic District |
| Hamilton Park |
| Hazel Avenue Prospect Avenue Historic District |
| Hennepin Canal Historic District |
| Hermosa Bungalow Historic DIstrict |
| Hines, Edward Jr., Veterans Administration Hospital Historic District |
| Humboldt Park |
| Hyde Park-Kenwood Historic District |
| Illinois Industrial School for Girls |
| Illinois Institute of Technology Academic Campus |
| Illinois State Fairgrounds |
| Illinois State Penitentiary-Joliet Historic District |
| Illinois Waterway Project Office |
| Independence Park |
| Indian Boundary Park |
| Indian Hill Manor and Farm Historic District |
| Jackson Park Historic Landscape District and Midway Plaisance |
| Jacksonville Downtown Historic District |
| Jacksonville Historic District |
| Jefferson Park |
| Jeffery-Cyril Historic District |
| Jensen, Jens, Summer House and Studio |
| Jerseyville Downtown Historic District |
| Joliet East Side Historic District |
| Joliet Steel Works |
| Judah, Noble, Estate |
| Kankakee State Hospital Historic District |
| Keithsburg Historic District |
| King, Moses, Brick and Tile Works |
| Kitchell Park |
| K-Town Historic District |
| La Grange Lock and Dam Historic District |
| LaHarpe Historic District |
| Lake Bluff Uptown Commercial Historic District |
| Lake Ellyn Park |
| Lake Forest Cemetery |
| Lake Forest Historic District |
| Lakeview Historic District |
| Lakewood Balmoral Historic District |
| LaSalle Downtown Commercial District |
| LaSalle Street Auto Row Historic District |
| Lathrop, Julia C., Homes |
| Lebanon Historic District |
| LeClaire Historic District |
| Lemont Downtown Historic District |
| LeRoy Commercial Historic District |
| Libertyville Downtown Historic District |
| Lincoln Courthouse Square Historic District |
| Lincoln Home National Historic Site |
| Lincoln Park |
| Lincoln Park Lily Pool |
| Lincoln's New Salem Village |
| Linden Park Place-Belle Avenue Historic District |
| Lock and Dam No. 13 Historic District |
| Lock and Dam No. 15 Historic District |
| Lock and Dam No. 17 Historic District |
| Lock and Dam No. 18 Historic District |
| Lock and Dam No. 21 Historic District |
| Lockport Historic District |
| Lockport Lock, Dam and Power House Historic District |
| Logan Square Boulevards Historic District |
| Loop Retail Historic District |
| Lowell Park |
| Lumpkin Heights and Elm Ridge Subdivision Historic District |
| Macktown Historic District |
| Macomb Courthouse Square historic District |
| Maeystown Historic District |
| Main Street Historic District |
Data from United States Park Service and Wikidata
