Ohio - Constructed - 1900–1909
| Adena Court Apartments |
| Akron Public Library |
| Anna-Dean Farm |
| Baltimore & Ohio Railroad Terminal |
| Becker Lumber and Manufacturing Company |
| Berdan Building |
| Caxton Building |
| Cleveland Trust Company |
| Clutts House |
| Conneaut Harbor West Breakwater Light |
| Dayton Arcade |
| Delaware Public Library |
| Del Monte Apartments |
| Edna, The |
| Edwards Gymnasium/Pfieffer Natatorium |
| Farmers National Bank |
| First National Bank and Trust Building |
| First National Bank Building |
| Garver Brothers Store |
| Gertenslager Carriage and Wagon Company |
| Glamorgan |
| Gothic Building, The |
| Haddon Hall |
| Hamilton Catholic High School |
| Hamilton County Memorial Building |
| Hanna House |
| Hanna, Howard M., Jr., House |
| Hinde & Dauch Paper Co. |
| Houston House |
| Jacobs, Felix A., House |
| Johnson-Campbell House |
| Kaiser, John, House |
| Kaufman, Frank J., House |
| Kinsey, The |
| Lanning, T., & Co. Department Store |
| League Park |
| Lovejoy, Carrie, House |
| Mahoning County Courthouse |
| Marshall, David, House |
| Masonic Temple Building |
| McKinley, William, Tomb |
| Memorial Hall |
| Mount Zion Baptist Church |
| Municipal Light Plant |
| New Hayden Building |
| No. 5 Fire Station |
| Northfield Town Hall |
| Robinson, Byron W., House |
| Rockefeller Building |
| Schueller, Erwin W., House |
| Southington Township School |
| St. Adalbert Polish Catholic Church |
| Stivers High School |
| St. Ladislaus Roman Catholic Church |
| St. Mary Roman Catholic Church |
| St. Mary's School |
| Times Building-Lodge Hall |
| Toledo Harbor Light |
| Traction Company Building |
| Travelers Hotel |
| Union Trust Building |
| Walnut Street School |
| Warren Public Library |
| Werner, Edward P., House |
| West End Elementary School |
| West School |
Data from United States Park Service and Wikidata
