Maryland
| Nom du Parc | Ville | Type du parc |
| Antietam National Battlefield | Sharpsburg | National Battlefield |
| Antietam National Cemetery | Sharpsburg | National Cemetery |
| Assateague Island National Seashore | Du Maryland à Washington | National Seashore |
| Baltimore-Washington Parkway | Washingron D.C. and Baltimore | Parkway |
| Catoctin Mountain Park | Thurmont | Park |
| Chesapeake & Ohio Canal National Historical Park | Potomac River | National Historical Park |
| Chesapeake Bay Gateways Network | Chesapeake Bay Watershed | |
| Clara Barton National Historic Site | Glen Echo | National Historic Site |
| Fort Foote Park | Oxon Hill | Park |
| Fort McHenry National Monument and Historic Shrine | Baltimore | National Monument and Historic Shrine |
| Fort Washington Park | Fort Washington | Park |
| Frederick Law Olmsted National Historic Site | Brookline | National Historic Site |
| Glen Echo Park | Glen Echo | Park |
| Greenbelt Park | Greenbelt | Park |
| Hampton National Historic Site | Towson | National Historic Site |
| Harmony Hall | Prince George's County | |
| Monocacy National Battlefield | Frederick | National Battlefield |
| Oxon Cove Park & Oxon Hill Farm | Oxon Hill | |
| Piscataway Park | Accokeek | Park |
| Suitland Parkway | Prince Georges County | Parkway |
| Thomas Stone National Historic Site | Port Tobacco | National Historic Site |
