Ohio - Area of significance: Military
| 103rd Ohio Volunteer Infantry Association Barracks |
| Albert Krumm Apartments Historic District |
| Battle of Berlin Heights Engagement Site |
| Beall, Gen. Reasin, House |
| Big Bottom Massacre Site |
| Buffington Island |
| Camp Chase Site |
| Cockerill House |
| Crawford, Col., Burn Site Monument |
| Crawford, Col. William, Capture Site |
| Dayton Power and Light Building Group |
| Deming, Col. Simeon, House |
| Dye, John Minor, Stone House |
| Fallen Timbers Battlefield |
| Fort Defiance Park |
| Fort Hayes |
| Fort Jefferson Site |
| Fort Laurens Site |
| Fort Meigs |
| Fort Recovery Site |
| Fort St. Clair Site |
| Fulton-Presbyterian Cemetery |
| Gnadenhutten Massacre Site |
| Grant, Ulysses S., Boyhood Home |
| Harding, Warren G., House |
| Harmar Historic District |
| Harrison, Gen. William Henry, Headquarters |
| Harrison, William Henry, Tomb State Memorial |
| Hayes, Rutherford B., House |
| Hertzler, Daniel, House |
| Huffman Field |
| Johnson Island Civil War Prison and Fort Site |
| Lansdowne House |
| Marietta Historic District |
| Martindale, Samuel, House |
| McCook, Daniel, House |
| McPherson, Maj. Gen. James B., House |
| Morgan, John H., Surrender Site |
| Oesterlein Machine Company-Fashion Frocks, Inc. Complex |
| Ohio Soldiers' And Sailors' Home |
| Ohio State Arsenal |
| Pendleton, George Hunt, House |
| Pennsylvania Railroad Depot And Baggage Room |
| Perry's Victory and International Peace Memorial |
| Piatt, Abram S., House and Piatt, Donn S., House |
| Pickaway Settlements Battlesite |
| Piqua Historical Area State Memorial |
| Putnam, Rufus, House |
| Rickenbacker, Capt. Edward V., House |
| SHENANDOAH Crash Sites |
| Sheridan House |
| Tanner, William C., House |
| Toronto World War I Momument |
| Unit III, Dayton Project |
| USS COD (submarine) |
| Waldschmidt-Camp Dennison District |
| War Of 1812 Battle Site |
| Wyatt's Tavern-Fort Morrow Site |
| Young, Col. Charles, House |
Data from United States Park Service and Wikidata
