Ohio - Significance region: Local
| Dayton, James, House, II |
| Dayton Motor Car Company Historic District |
| Dayton Power and Light Building Group |
| Dayton Power And Light Company Mound |
| Dayton Stove and Cornice Works |
| Dayton Street Historic District |
| Dayton Terra-Cotta Historic District |
| Dayton View Historic District |
| Dayton View Triangle Historic District |
| Dayton Women's Club |
| Dayton Young Men's Christian Association Building |
| Dean Family Farm |
| Dean Road Bridge |
| Deardoff, Daniel L., House |
| Decker, Elias, Farmhouse |
| Decker, Henry, Farmstead |
| Decker, Stephen, Rowhouse |
| Deeds Carillon |
| Deerlick Farm |
| Deersville Historic Distirct |
| Deerwood Farm |
| Deffenbaugh, George, Mound |
| Defiance Downtown Historic District |
| Defiance High School |
| Defiance Public Library |
| DeHeck, Albert, House |
| Deis, John, House |
| Deitz, Samuel, Farmhouse |
| Delashment, Elias, House |
| Delaware Post Office |
| Delaware Public Library |
| Delco Building |
| Del Monte Apartments |
| Deming, Col. Simeon, House |
| Demoret Mound |
| Denison, William, House |
| Dennison High School |
| Dentzel, William H., 1921 Carousel |
| Dentzel, William H., 1924 Carousel |
| Denzel, John, House |
| Detrick Milling and Distilling Company |
| Detroit-Superior High Level Bridge |
| Detroit-Warren Building |
| Detwiller, John, Tavern and Farmstead |
| Deuscher, Henry P., House |
| Devanney Site |
| DeVilbiss Manufacturing Building |
| Dewalt Building |
| Dew House |
| Dewitt, Zachariah Price, Cabin |
| DeYarmon, Joseph L. House |
| Dey Road Bridge |
| Diamond Historic District |
| Diamond Match Historic District |
| Dickey, Moses and Margaret, House |
| Dilger Store |
| Disciple-Christian Church |
| Diver, John, House and Storebuilding |
| Division Avenue Pumping Station |
| Dixon-Globe Opera House-Robinson-Schwenn Building |
| Dixon Hall Apartments |
| Dixon Mound |
| Doan House |
| Doan School |
| Doctors' Building |
| Dodge Site |
| Doerzbach, George J., House |
| Dole-Darrell House |
| Dombar, Benjamin, House and Studio |
| Domestic Arts Hall And Flower Hall |
| Domhoff Buildings |
| Dorsey Building |
| Douglas, S.M., House |
| Dovel-Bowers House |
| Dovel, J. H., Farm |
| Dow House |
| Downing, John, Jr., House |
| Downtown Ashland Historic District |
| Downtown Bellefontaine Historic District |
| Downtown Dayton Historic District |
| Downtown Ironton Historic District |
| Downtown Mansfield Historic District |
| Downtown Mount Vernon Historic District |
| Downtown Oberlin Historic District |
| Downtown Painesville Historic District |
| Downtown Sandusky Commercial Historic District |
| Downtown Van Wert Historic District |
| Downtown Willoughy Historic District |
| Downtown Xenia Historic District |
| Downtown Zanesville Historic District |
| Drake, Alonzo, House |
| Drake, Elam, House |
| Dresden Suspension Bridge |
| Drexel Theater |
| Droppers, Carl, House |
| Duane Block |
| Dublin Cemetery Vaults |
| Dublin Christian Church |
| Dublin Christian Church |
| Dublin High Street Historic District |
Data from United States Park Service and Wikidata
