Maryland - Significance region: Local
| Fiery, Joseph, House |
| Finney Houses Historic District |
| First Avenue School |
| First Baptist Church |
| First Church of Christ, Scientist |
| Fletcher, K. B., Mill |
| Folck's Mill |
| Footer's Dye Works |
| Forest View |
| Fort Carroll |
| Franklin Square Historic District |
| Franklin Street Presbyterian Church and Parsonage |
| Franklintown Historic District |
| Frank, L., & Son Building |
| Freetown Rosenwald School |
| Friends Burial Ground |
| Friendship |
| Friendship United Methodist Church, Old |
| Friendship Valley Farm |
| Frizzell, Andrew P., House and Farm Complex |
| Frostburg Historic District |
| Funk, Jacob M., Farm |
| Funkstown Historic District |
| Gallagher Mansion and Outbuilding |
| Gambrill House |
| Gandy Belting Company Building |
| Garden Hill |
| Garrett Building |
| Gay Street Historic District |
| Gilpin's Falls Covered Bridge |
| Gladden Farm |
| Glebe House |
| Glencoe |
| Glenelg Manor |
| Glenn Dale Tuberculosis Hospital and Sanatorium |
| Glen Oak Hotel |
| Glenview Farm |
| Gobbler Hill |
| Goldsborough House |
| Gompers School |
| Good-Hartle Farm |
| Goodloe, Don S. S., House |
| Good-Reilly House |
| Goucher College |
| Grace Episcopal Church |
| Grace Episcopal Church Complex |
| Grace-Hampden Methodist Episcopal Church |
| Graham-Crocker House |
| Grahame House |
| Granite Historic District |
| Grassland |
| Gray Gables |
| Graystone Lodge |
| Greater Homeland Historic District |
| Great House |
| Greene Street Historic District |
| Green's Inheritance |
| Grey Rock Mansion |
| Grief, L. and Bro., Inc. Manufactory |
| Griffith House |
| Grossnickel, Peter of P., Farm |
| Guilford Historic District |
| Guilford Quarry Pratt Through Truss Bridge |
| Gunn, Samuel, House |
| Gunpowder Meetinghouse |
| Gunther Brewing Company |
| Hagerman, William, Farmstead |
| Hagerstown Charity School |
| Hagerstown City Park Historic District |
| Hagerstown Commercial Core Historic District |
| Hagerstown Historic District |
| Haley, Francis, House |
| Hamilton, James, House |
| Hammond Wood Historic District |
| Hampden Historic District |
| Hampstead School |
| Hancock's Resolution |
| Handsell |
| Hard Bargain Farm |
| Hard Lodging |
| Harford Furnace Historic District |
| Harmony Hall |
| Harper, George, Store |
| Harris Farm |
| Harris, Nathan and Susannah, House |
| Harundale Presbyterian Church |
| Haviland, Edward W., House |
| Havre de Grace Historic District |
| Hawkins Pharsalia |
| Hayman, Jeptha, House |
| Hays House |
| Hays, Joseph C., House |
| Hayward's Lott |
| Hazelwood |
| Heath Farm Camp Archeological Site |
| Heath Farm Jasper Quarry Archeological Site |
| Hebrew Orphan Asylum |
| Hebron |
| Heighe House |
| Heiser, Rosenfeld, and Strauss Buildings |
Data from United States Park Service and Wikidata
