Maryland - Area of significance: Military
| Annapolis National Cemetery |
| Annington |
| Antietam National Battlefield |
| Artisan's House |
| Baltimore National Cemetery |
| Barney, Commodore Joshua, House |
| Bel Air Armory |
| Berkley Crossroads Historic District |
| Bethesda Naval Hospital Tower |
| Bladensburg Battlefield |
| Bostwick |
| Bowlingly |
| Bryantown Historic District |
| Catoctin Mountain Park |
| Centreville Armory |
| Chance Boatyard |
| Chapline, William, House |
| Charlotte Hall Historic District |
| Chestertown Armory |
| College Park Airport |
| Cool Hollow Home |
| Crampton's Gap Historic District |
| Crisfield Armory |
| Cross Manor |
| Denton Armory |
| Donnelly, Daniel, House |
| Elkton Armory |
| Elliot-Bester House |
| Epiphany Chapel and Church House |
| Federal Hill Historic District |
| Fifth Regiment Armory |
| Flag House |
| Folck's Mill |
| Fort Carroll |
| Fort Frederick State Park |
| Fort Garrison |
| Fort McHenry National Monument and Historic Shrine |
| Fort Nonsense |
| Fort Washington |
| Frederick Armory |
| Frederick Historic District |
| Friends Advice |
| Friendship Hall |
| Friendship Valley Farm |
| Funkstown Historic District |
| Gresham |
| Hagerstown Armory |
| Hancock's Resolution |
| Hessian Barracks |
| Hitt's Mill and Houses |
| Hoffman Farm |
| Holly Hall |
| Hull Memorial Christian Church |
| Hyattsville Armory |
| Linden |
| Loudon Park National Cemetery |
| Mallows Bay-Widewater Historic and Archeological District |
| Markell, George, Farmstead |
| Maryland Heights, Spur Battery |
| Medical Hall Historic District |
| Milton |
| Mitchell House |
| Mitchell House |
| Monocacy National Battlefield |
| Mount Adams |
| Mount Airy |
| Mt. Nebo |
| Naval Ordnance Laboratory |
| NELLIE CROCKETT |
| Packhorse Ford |
| Peace Cross |
| Perry Point Mansion House and Mill |
| Pikesville Armory |
| Pleasant Prospect |
| Poolesville Historic District |
| Porto Bello |
| President Street Station |
| Prospect Hall |
| Rigbie House |
| River View, The |
| Rodgers Tavern |
| Rose Hill |
| Sandgates On Cat Creek |
| Sharpsburg Historic District |
| Sheffer, Daniel, Farm |
| Shoemaker, Henry, Farmhouse |
| Sion Hill |
| Springfield Farm |
| SS JOHN W. BROWN (Liberty Ship) |
| Stancioff House |
| St. Clement's Island Historic District |
| St. Matthew's Church |
| St. Paul's Episcopal Church |
| Sumner, Charles, Post #25, Grand Army of the Republic |
| Taylor, David W., Model Basin |
| Tome School for Boys Historic District |
| Tomlinson Inn and the Little Meadows |
| Towson Academy |
| Turner's and Fox's Gaps Historic District |
| U-1105 BLACK Panther (Type VIIC German Submarine) |
Data from United States Park Service and Wikidata
