This is a list of the National Register of Historic Places listings in St. Clair County, Illinois.
Location of St. Clair County in Illinois
This is intended to be a complete list of the properties and districts on the National Register of Historic Places in St. Clair County, Illinois, United States. Latitude and longitude coordinates are provided for many National Register properties and districts; these locations may be seen together in a map.[1]
There are 30 properties and districts listed on the National Register in the county, including 4 National Historic Landmarks. Another property was once listed but has been removed.
^The latitude and longitude information provided in this table was derived originally from the National Register Information System, which has been found to be fairly accurate for about 99% of listings. Some locations in this table may have been corrected to current GPS standards.
^ abNumbers represent an alphabetical ordering by significant words. Various colorings, defined here, differentiate National Historic Landmarks and historic districts from other NRHP buildings, structures, sites or objects.
^The eight-digit number below each date is the number assigned to each location in the National Register Information System database, which can be viewed by clicking the number.
^Reed, Nelson A. National Register of Historic Places Inventory/Nomination: Emerald Mound and Village Site. National Park Service, 1969-09-12, 4.
^Sculle, Keith A., and Michael Ward. National Register of Historic Places Inventory/Nomination: Knobeloch-Seibert Farm. National Park Service, n.d., 9.
^Fowler, Melvin L., and Glen A. Freimuth. National Register of Historic Places Inventory/Nomination: Lunsford-Pulcher Archeological Site. National Park Service, n.d., 4.
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