National Register of Historic Places listings in Lake County, Illinois

This is a list of the National Register of Historic Places listings in Lake County, Illinois.

This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Lake 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.

There are 95 properties and districts listed on the National Register in the county, including two National Historic Landmarks. Another property was once listed but has been removed.