Ohio - Area of significance: Community Planning
| Hamilton Historic Civic Center |
| Hamilton Park Historic District |
| Hanford Village George Washington Carver Addition Historic District |
| Hanitch-Huffman House |
| Harmar Historic District |
| Heyne-Zimmerman House |
| Historic Northwest District |
| Holgate Avenue Historic District |
| Hotel Statler |
| House at 753 East Broad Street |
| Hudson Historic District |
| Huffman Historic District |
| Inglewood Historic District |
| Johnson-Campbell House |
| Jones Home Subdivisions Historic District |
| Joseph-Cherrington House |
| Kauffman, Linus B., House |
| Kaufman, Frank J., House |
| Kenilworth Avenue Historic District |
| Kenmore Boulevard Historic District |
| Kimball, Addison, House |
| Kimball, Lemuel II, House |
| Kinsey, The |
| Kirby Road School |
| Kossuth Colony Historic District |
| Lakeside Historic District |
| Lancaster West Main Street Historic District |
| Laurel Homes Historic District |
| Lebanon Commercial District |
| Levy, Soloman, House |
| Long-Romspert House |
| Lovejoy, Carrie, House |
| Lyceum Village Square And German Wallace College |
| Mackinaw Historic District |
| Magnolia-Wade Park Historic District |
| Main Street Historic District |
| Mantua Center School |
| Mariemont Historic District |
| Marietta Historic District |
| Market-Mohawk Center |
| Marysville Light and Water Company Plant |
| Mayfield Heights Historic District |
| Medfair Heights Apartment Historic District |
| Medina Public Square Historic District |
| Mentor Village Hall |
| Midtown Historic District |
| Mill Creek Park Historic District |
| Miller Block |
| Mill Worker House No. 1 |
| Mill Worker House No. 3 |
| Mill Worker House No. 4 |
| Mill Worker House No. 5 |
| Mohawk Place Historic District |
| Moore, Edward W. and Louise C., Estate |
| Morris, C. E., House |
| Municipal Building |
| Municipal Light Plant |
| Myrtle-Highview Historic District |
| Neal Terrace |
| Nelsonville Historic District |
| Newark High School |
| New Indianola Historic District |
| Newman, William, House |
| Newport Village Allotment Historic District |
| North Broadway Historic District |
| North Main-North Gay Streets Historic District |
| Nurre-Royston House |
| Oakdale Cemetery Historic District |
| Oakland Residential Historic District |
| Ohio Finance Building |
| Old Beechwold Historic District |
| Old Elyria Water Tower |
| Old Federal Building and Post Office |
| Olney, Charles, House and Gallery |
| O'Neil's Department Store |
| Oppmann Terrace |
| O'Shaughnessy Dam and Bridge |
| Ottawa Waterworks Building |
| Parkside Apartments |
| Perry, Norman Dewey, House |
| Poinciana Flats |
| Prentiss, Frederick, House |
| Prentiss-Tulford House |
| Reily, Robert, House |
| Rhodes and Watters Apartment Buildings, The |
| Riddle-Friend House |
| Riverview |
| Rochester Square Historic District |
| Rockefeller Park and Cleveland Cultural Gardens Historic District |
| Roundwood Manor at Daisy Hill Farm |
| Rush Creek Village Historic District |
| Saint Paul's Episcopal Church |
| Saint Peter and Saint Paul Historic District-Oliver's Second addition |
| Schantz Park Historic District |
| Schueller, Erwin W., House |
| Scofield-Sanor House |
| Scranton South Side Historic District |
| Sedamsville Village Historic District |
| Sessions Village |
| Shaker Farm Historic District |
Data from United States Park Service and Wikidata
