Ohio - Criteria: C (architecture/engineering)
| Decker, Elias, Farmhouse |
| Decker, Henry, Farmstead |
| Decker, Stephen, Rowhouse |
| Deerlick Farm |
| Deersville Historic Distirct |
| Deerwood Farm |
| Defiance Public Library |
| DeHeck, Albert, House |
| Deis, John, House |
| Deitz, Samuel, Farmhouse |
| Delashment, Elias, House |
| Delaware County Courthouse |
| Delaware County Jail and Sheriff's Residence |
| Delaware Public Library |
| Delco Building |
| Demand-Gest House |
| Deming, Col. Simeon, House |
| Denison, William, House |
| Dennison High School |
| Dentzel, William H., 1924 Carousel |
| Denzel, John, House |
| Derby, H. W., Building |
| Detmer, A. M., House |
| Detroit Avenue Bridge |
| Detroit-Superior High Level Bridge |
| Detroit-Warren Building |
| Detwiller, John, Tavern and Farmstead |
| Deuscher, Henry P., House |
| Dewalt Building |
| Dewitt, Zachariah Price, Cabin |
| DeYarmon, Joseph L. House |
| Dey Road Bridge |
| Diamond Historic District |
| Disciple-Christian Church |
| Dixon-Globe Opera House-Robinson-Schwenn Building |
| Dixon Hall Apartments |
| Doan House |
| Doan School |
| Dobkins, John and Syd, House |
| Doctors' Building |
| Doerzbach, George J., House |
| Dole-Darrell House |
| Domestic Arts Hall And Flower Hall |
| Domhoff Buildings |
| DONALD B (towboat) |
| Dorsey Building |
| Douglas, S.M., House |
| Dovel-Bowers House |
| Dovel, J. H., Farm |
| Dow House |
| Downing, John, Jr., House |
| Downtown Ironton Historic District |
| Downtown Xenia Historic District |
| Drake, Alonzo, House |
| Drake, Elam, House |
| Dresden Suspension Bridge |
| Drexel Theater |
| Duane Block |
| Dublin Cemetery Vaults |
| Dublin Christian Church |
| Dublin Christian Church |
| Dublin High Street Historic District |
| Dublin Veterinary Clinic |
| Duffy, Michael, Farm |
| Dunbar Historic District |
| Duncan, Robert P., House |
| Duncarrick |
| Dunham, Hezekiah, House |
| Dunham Tavern |
| Dun, John, Homestead |
| Dunlap, William K., House |
| Dunton House |
| Dustin Cabin |
| Duttenhofer Building |
| Dye, John Minor, Stone House |
| Eager Inn |
| Eagle Creek Covered Bridge |
| Eagles Building |
| Eagles Building |
| Eagles Building-Strand Theater |
| Eagles Temple |
| Eakin Mill Covered Bridge |
| Ealy, George and Christina, House |
| Earley-Hartzell House |
| Early Greek Revival Cottage |
| Early Greek Revival House |
| East 89th Street Historic District |
| East Boulevard Apartment House |
| East Broad Street Commercial Building |
| East Broad Street Historic District |
| East Broad Street Presbyterian Church |
| East Cleveland District 9 School |
| Eastern Hills Young Men's Christian Association (YMCA) |
| East Fifth Street Historic District |
| East Fourth Street Historic District |
| East High Street District |
| East Liberty School, District No. 11 |
| East Liverpool Downtown Historic District |
| East Liverpool Post Office |
| East Market Street Church of Christ |
Data from United States Park Service and Wikidata
