Ohio - Area of significance: Exploration/Settlement
| Abbott-Page House |
| African Jackson Cemetery |
| Akey, James, Farm |
| Allen, Darlon, House |
| Anderson, Levi, House |
| Armstrong Farm |
| Armstrong, Joseph, Farm |
| Arnold Homestead |
| Augspurger, Frederick, Farm |
| Augspurger Grist Mill |
| Augspurger, John, Farm No. 1 |
| Augspurger, John, Farm No. 2 |
| Augspurger Paper Company Rowhouse #1 |
| Augspurger Paper Company Rowhouse #2 |
| Augspurger, Samuel, Farm |
| Augspurger, Samuel, House |
| Augspurger Schoolhouse |
| Barker, Col. Joseph, House |
| Barker, Judge Joseph, Jr., House |
| Batavia House |
| Bethel Methodist Church |
| "Blaine Hill ""S"" Bridge" |
| Brookdale Farm |
| Brooklyn Centre Historic District |
| Brownhelm Historic District |
| Brown, Jim, Tavern |
| Bull, T.J. and Sarah, House |
| Burgett House And Barn |
| Burrell, Jabez and Robbins, House and Cheese Factory |
| Burr, George, House |
| Burt, William, House |
| Cahoon, Wilbur, House |
| Caldwell Downtown Historic District |
| Caldwell, Samuel, House |
| Case-Barlow Farm |
| Chalfant Church |
| Chapman, John A., House |
| Clague House |
| Coal Run Historic District |
| Crawford, Col. William, Capture Site |
| Danalds, Samuel, House |
| Dana, Marcus, House |
| Danford, Samuel, Farm, Church and Cemetery |
| Davis, Alexander, Cabin |
| Dublin High Street Historic District |
| Dye, John Minor, Stone House |
| Ealy, George and Christina, House |
| East Main Street Historic District |
| Edwards, John Stark, House |
| Ehresman, Christian, Farm |
| Elliott House |
| Elson-Magnolia Flour Mill |
| Erie Street Cemetery Historic District |
| Falls River Road |
| Federalton |
| Ferguson, Andrew, House |
| Fifth and Lawrence Streets Residential District |
| Fort Ball-Railroad Historic Disrict |
| Fort Defiance Park |
| Fox-Pope Farm |
| Frazee, Stephen, House |
| Fuller-Bramley House |
| Gabel, Daniel, House |
| Galigher, James, House |
| Gantz Homestead |
| Garfield, Milton, House |
| Gast, Matthias, House and General Store |
| Ghent Historic District |
| Gilboa Main Street Historic District |
| Glenn, John, Boyhood Home |
| Golden Lamb |
| Goll Homestead |
| Groveport Log Houses |
| Harmony Hill Dairy House |
| Harper, William Rainey, Log House |
| Harvey, Eli, House |
| Headley Inn., Smith House And Farm |
| Henninger, Phillip, House |
| Hertzler, Daniel, House |
| Holy Family Catholic Church |
| Honam, John, House |
| Howe Tavern |
| Hueston, Matthew, House |
| Hull, Patrick, House |
| Hune, William, Farm |
| Hunts Corners |
| Iddings, Benjamin, Log House |
| Isham, John, Farmstead |
| Iutzi, Christian, Farm |
| J & M Trading Post |
| J & M Trading Post - Annex |
| Johnston, William C., House And General Store |
| Jones, Elam, Public House |
| Kellog, Ethol, House |
| Kennel, John, Jr., Farm |
| Kennel, John Sr., Farm |
| Kenton-Hunt Farm |
| Keystone Furnace |
| Kilgore Union Presbyterian Church |
| Kilpi Hall |
Data from United States Park Service and Wikidata
