List of National Historic Landmarks in Illinois

This list of National Historic Landmarks in Illinois, has 89 entries including Eads Bridge, which spans into Missouri and which the National Park Service credits to Missouri's National Historic Landmark list. Also added are two sites that were once National Historic Landmarks before having their designations removed. All National Historic Landmarks of the United States are also listed on the more general, National Register of Historic Places.

The National Historic Landmark Program is administered by the National Park Service, a branch of the Department of the Interior. The National Park Service determines which properties meet NHL criteria and makes nomination recommendations after an owner notification process. The Secretary of the Interior reviews nominations and, based on a set of predetermined criteria, makes a decision on NHL designation or a determination of eligibility for designation. Both public and privately owned properties can be designated as NHLs. This designation provides indirect, partial protection of the historic integrity of the properties via tax incentives, grants, monitoring of threats, and other means. Owners may object to the nomination of the property as an NHL. When this is the case the Secretary of the Interior can only designate a site as eligible for designation.

Current NHLs in Illinois

 * Numbers represent an ordering by significant words. Different colors, defined here, differentiate the National Historic Landmark Districts from other NHL buildings, structures, sites or objects.


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