This is a list of properties and districts in Ohio that are listed on the National Register of Historic Places. There are over 4.000 in total. Of these, 73 are National Historic Landmarks. There are listings in each of Ohio's 88 counties.
The locations of National Register properties and districts (at least for all showing latitude and longitude coordinates below), may be seen in an online map by clicking on "Map of all coordinates".[a]
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