Maryland - Criteria: A (event)
| Crisfield Historic District |
| Crum Road Bridge |
| Cullen, Victor, Center, Old Administration Building |
| Cullen, Victor, School Power House |
| Cumberland YMCA |
| Cummins Memorial Church |
| Cut-Off Channel Range Front Light Station |
| Cut-off Channel Range Rear Light Station |
| Daffin House |
| Daniels Mill |
| Darlington Historic District |
| Darnall Place |
| Davis-Warner House |
| Decatur Heights Historic District |
| Deep Falls |
| Deer Creek Friends Meetinghouse |
| Denton Armory |
| Denton Historic District |
| Dickeyville Historic District |
| Ditto Knolls |
| Donnelly, Daniel, House |
| Dorchester County Courthouse and Jail |
| Dorguth Memorial United Methodist Church |
| Dorsey-Palmer House |
| Doub Farm |
| Doub's Mill Historic District |
| Douglass, Frederick, High School |
| Douglass Summer House |
| Downtown Cumberland Historic District |
| Drane, James, House |
| Druid Hill Park Historic District |
| Drummine Farm |
| Drum Point Lighthouse |
| Dudley's Chapel |
| Dumbarton Historic District |
| Dundalk Historic District |
| Dundalk-Liberty-Cornwall Gardens |
| Early Family Historic District |
| East Baltimore Historic District, Old |
| Eastern Female High School |
| Eastern High School |
| East Monument Historic District |
| East New Market Historic District |
| East Oaks |
| Easton Historic District |
| E.C. COLLIER |
| EDMEE S. (log canoe) |
| Edmondson Avenue Historic District |
| EDNA E. LOCKWOOD (Chesapeake Bay bugeye) |
| Ednor Gardens Historic District |
| ELF, THE (yacht) |
| Elkridge Furnace Complex |
| Elkton Armory |
| Ellicott City Historic District |
| Ellicott City Station |
| ELSWORTH |
| Emmitsburg Historic District |
| Engine House No. 6 |
| Epiphany Chapel and Church House |
| Equitable Gas Works |
| Erb, Christopher, House |
| Erlanger Buildings |
| Eutaw-Madison Apartment House Historic District |
| Evergreen |
| Evergreen |
| Evergreen House |
| Eyler, John, Farmstead |
| Fairmont Heights Historic District |
| FANNIE L. DAUGHERTY |
| F. C. LEWIS, JR |
| Federal Hill Historic District |
| Federal Hill South Historic District |
| Fells Point Historic District |
| Female Seminary |
| Fifth Regiment Armory |
| First Avenue School |
| First Baptist Church |
| Flag House |
| Fletcher, K. B., Mill |
| FLYING CLOUD (log canoe) |
| Folck's Mill |
| Footer's Dye Works |
| Fort Carroll |
| Fort Frederick State Park |
| Fort Garrison |
| Fort McHenry National Monument and Historic Shrine |
| Fort Nonsense |
| Fort Washington |
| Fourpoints Bridge |
| Franklin Square Historic District |
| Franklin Street Presbyterian Church and Parsonage |
| Frederick Armory |
| Frederick Historic District |
| Freetown Rosenwald School |
| Friends Advice |
| Friends Burial Ground |
| Frostburg Historic District |
| Fuller-Baker Log House |
| Funk, Jacob M., Farm |
| Funkstown Historic District |
Data from United States Park Service and Wikidata
