| Units |
| National Battlefields | Antietam |
| Monocacy | |
| National Historical Parks | Chesapeake and Ohio Canal (Multi-State) |
| Harpers Ferry (Multi-State) | |
| Harriet Tubman Underground Railroad | |
| National Historic Sites | Clara Barton |
| Hampton | |
| Thomas Stone | |
| National Monuments | Fort McHenry |
| National Scenic Trails | Appalachian (Multi-State) |
| Potomac Heritage (Multi-State) | |
| National Seashores | Assateague Island |
| Other Sites | Catoctin Mountain |
| Fort Washington Park | |
| Greenbelt Park | |
| Piscataway Park | |
| National Capital Parks - East (Multi-State) |
| Non-Units |
| National Heritage Areas | Baltimore |
| Journey Through Hallowed Ground (Multi-State) | |
| Captain John Smith Chesapeake (Multi-State) | |
| National Historic Trails | Star-Spangled Banner (Multi-State) |
| Wash.-Roch. Rev. Route (Multi-State) | |
| Other Sites (Non Unit) | Chesapeake Bay (Multi-State) |