Ohio - Role: Building
| Hatton Farm |
| Hawthorn Hill |
| Hayden Building |
| Hayes, Rutherford B., House |
| Hayesville Opera House |
| Hay-McKinney and Bingham-Hanna House |
| Hayner, Mary Jane, House |
| Headley Inn., Smith House And Farm |
| Heckler Farmhouse |
| Hedges-Hunter-Keller-Bacon Gristmill |
| Heeter-Russo House |
| Heights Rockfeller Building |
| Helen Chapel |
| Heller, Edward, Residence |
| Helpman-Chaney House |
| Hemann, Joseph A., House |
| Hemminger Saloon |
| Henderson, Dr. David W., House |
| Henderson, John, House |
| Hendry, Francis, House |
| Henn, Albert W., Mansion |
| Henninger, Phillip, House |
| Henny Barn |
| Henry County Courthouse |
| Henry County Sheriff's Residence and Jail |
| Henry, Robert W., House |
| Henry W. Longfellow School |
| Herold Building |
| Herr, Christian S., House |
| Herrington, John, House and Herrington Bethel Church |
| Herrold, Thomas Jefferson, House and Store |
| Herron Gymnasium |
| Hershey, J., Residence |
| Hertzler, Daniel, House |
| Hess, Elmer, House |
| Heter Farm |
| Hewson-Gutting House |
| Heyne-Zimmerman House |
| Hidley, James P., Cottage |
| Higby House |
| Higgins, H. A., Building |
| Higginsport School |
| Highbank Farm |
| High House |
| Highland County Courthouse |
| Highland Egg and Poultry Company Building |
| Hillcrest Hotel |
| Hilliard Apartment Building |
| Hilliard Methodist Episcopal Church |
| Hill, James Delos, House |
| Hill, James, House |
| Hinde & Dauch Paper Co. |
| Hinde & Dauch Paper Co. |
| Hinde & Dauch Paper Co. |
| Hinde, James J., House |
| Hine, Horace L., House |
| Hirons-Brown House |
| Hise, Daniel Howell, House |
| Hoadley, George, Jr., House |
| Hobart, E. A., House |
| Hobart, William, Vacation House |
| Hoffman House |
| Hollencamp House |
| Hollister-Parry House |
| Holmes County Courthouse And Jail |
| Holy Angels Church |
| Holy Cross Church, Rectory and School |
| Holy Cross Lithuanian Roman Catholic Church |
| Holy Cross Monastery and Chapel |
| Holy Family Catholic Church |
| Holy Rosary Catholic Church |
| Holy Rosary Church |
| Holy Rosary Roman Catholic Church Complex |
| Home Building Association Bank |
| Home for the Aged Deaf |
| Homestead Theatre Block |
| Honam, John, House |
| Hoodin Building |
| Hood-Simmons House |
| Hooper Building |
| Hoover Farm |
| Hopkins, Benjamin F., Stone Building |
| Hopkins, Roswell, Residence |
| Horsey-Barthelmas Farm |
| Horton, Capt. Charles, House |
| Hosack House |
| Hosford House |
| Hosford, John, House |
| Hostetter Inn |
| Hotel Argonne |
| Hotel Ashtabula |
| Hotel Central |
| Hotel Courtland |
| Hotel Harding |
| Hotel Manchester |
| Hotel Metropole |
| Hotel Rieger |
| Hotel Statler |
| House at 1022 West Main Street |
| House at 121 South Ridge |
Data from United States Park Service and Wikidata
