Maryland - Criteria: C (architecture/engineering)
| Cut-Off Channel Range Front Light Station |
| Cut-off Channel Range Rear Light Station |
| Cylburn House and Park District |
| Daffin House |
| Dale's Right |
| Daniels Mill |
| Darlington Historic District |
| Darnall Place |
| Davidsonville Historic District |
| Davis-Warner House |
| Dawson Farm |
| Deal Island Historic District |
| Decatur Heights Historic District |
| Deep Falls |
| Deer Creek Friends Meetinghouse |
| De La Brooke Tobacco Barn |
| Denton Armory |
| Denton Historic District |
| Denton House |
| D. H. Springhouse |
| Dibb House |
| Dickeyville Historic District |
| Ditto Knolls |
| Donnelly, Daniel, House |
| Dorchester County Courthouse and Jail |
| Dorguth Memorial United Methodist Church |
| Dorsey Hall |
| Dorsey-Palmer House |
| Doub Farm |
| Doub's Mill Historic District |
| Doughoregan Manor |
| Dowden's Luck |
| Downtown Cumberland Historic District |
| Drane, James, House |
| Druid Hill Park Historic District |
| Drummine Farm |
| Drury-Austin House |
| Dudley's Chapel |
| Dumbarton Historic District |
| Dundalk Historic District |
| Eagle's Nest |
| Early Family Historic District |
| Early, William W., House |
| East Baltimore Historic District, Old |
| Eastern Female High School |
| Eastern High School |
| East Monument Historic District |
| East New Market Historic District |
| East Nottingham Friends Meetinghouse |
| East Oaks |
| Easton Historic District |
| EDMEE S. (log canoe) |
| Edmondson Avenue Historic District |
| EDNA E. LOCKWOOD (Chesapeake Bay bugeye) |
| Ednor Gardens Historic District |
| Elk Landing |
| Elkridge Furnace Complex |
| Elkton Armory |
| Ellerslie |
| Ellicott City Historic District |
| Elliot-Bester House |
| Elmonte |
| Elmwood |
| Embert, John, Farm |
| Emerson Bromo-Seltzer Tower |
| Emmitsburg Historic District |
| Engine House No. 6 |
| Engine House No. 8 |
| England, Isaac, House |
| Englar-Scweigart-Rinehart Farm |
| Enniscorthy |
| Epiphany Chapel and Church House |
| Equitable Gas Works |
| Erb, Christopher, House |
| Erlanger Buildings |
| Eutaw-Madison Apartment House Historic District |
| Evergreen |
| Evergreen |
| Evergreen House |
| Evergreen on the Falls |
| Exchange, The |
| Exeter |
| Eyler, John, Farmstead |
| Fairlee Manor Camp House |
| Fair Meadows |
| Farm Content |
| Fassitt House |
| Fat Oxen |
| Faust Brothers Building |
| Federal Hill Historic District |
| Federal Hill South Historic District |
| Federal Reserve Bank of Richmond, Baltimore Branch |
| Federalsburg West Historic District |
| Fells Point Historic District |
| Fiery, Joseph, House |
| Fifth Regiment Armory |
| Finney Houses Historic District |
| First Avenue School |
| First Baptist Church |
| First Church of Christ, Scientist |
Data from United States Park Service and Wikidata
