The United States' National Historic Landmark (NHL) program is operated under the auspices of the National Park Service, and recognizes structures, districts, objects, and similar resources according to a list of criteria of national significance.
[6] There are 76 NHLs in Ohio and four additional National Park Service-administered areas of primarily historic importance.
[7] Ohio's National Historic Landmarks are distributed across 37 of the 88 counties in the state.
The National Park Service lists these seven together with the NHLs in the state.
[15] The James A. Garfield National Historic Site, the William Howard Taft National Historic Site, and the Charles Young Buffalo Soldiers National Monument are also designated as NHLs and are listed above.
Adena
Baum-Taft House
Beginning Point of the U.S. Public Land Survey
Carew Tower-Netherland Plaza Hotel
Central Branch, National Home for Disabled Volunteer Soldiers
