National Register of Historic Places listings in Mahoning County, Ohio

This is a list of the National Register of Historic Places listings in Mahoning County, Ohio.

This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Mahoning County, Ohio, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a Google map.

There are 70 properties and districts listed on the National Register in the county, including 1 National Historic Landmark. Another property was once listed but has been removed.