Delaware - Criteria: A (event)
| Fairview |
| Fairview |
| Fell Historic District |
| Felton Railroad Station |
| Fennimore Store |
| Fenwick Island Lighthouse Station |
| Ferris, Zachariah, House |
| Fields Heirs |
| First Broiler House |
| Fisher, Andrew, House |
| Fisher's Paradise |
| Fleming House |
| Fort Christina |
| Fort Delaware on Pea Patch Island |
| Fort Dupont Historic District |
| Fort Miles Historic District |
| Fourteen Foot Bank Light |
| Frederica Historic District |
| Friends Meetinghouse |
| Garrett Snuff Mill |
| Garrett Snuff Mills Historic District |
| Georgetown Coal Gasification Plant |
| Godwin School |
| Gordon, J. M., House |
| Grace United Methodist Church |
| Grantham-Edwards-McComb House |
| Graves Mill Historic District |
| Green Mansion House |
| Green Meadow |
| Griffith's Chapel |
| Grose, Robert, House |
| Hale-Byrnes House |
| Hall, Col. David, House |
| Harlan and Hollingsworth Office Building |
| Harmon, Isaac, Farmhouse |
| Harmon School |
| Harmony Church |
| Hart House |
| Hazel Glen |
| Hearn and Rawlins Mill |
| Hearn Potato House |
| Hebron Methodist Protestant Church and Cemetery |
| Hedgelawn |
| Hersey-Duncan House |
| Hickman Blacksmith Shop and House |
| Hickman Row |
| Higgins, S., Farm |
| Highball Signal |
| Hill Island Farm |
| Hitch, E. L., Potato House |
| Hitchens, Ames, Chicken Farm |
| Holladay-Harrington House |
| Holton, S., Farm |
| Holy Trinity |
| Homestead Hall |
| Hopkins' Covered Bridge Farm |
| Idalia Manor |
| Indian Mission Church |
| Indian Mission School |
| Indian River Life Saving Service Station |
| Iron Hill School No. 112C |
| Johnson-Morris House |
| Johnson School |
| Judge's House and Law Office |
| KATHERINE M. LEE (Schooner) |
| Kenton Historic District |
| Kenton Post Office |
| Kerr, Andrew, House |
| Killgore Hall |
| Kingswood Methodist Episcopal Church |
| Laurel Historic District |
| Lewden, John, House |
| Lewes Historic District |
| Lewis Family Tenant Agricultural Complex |
| Lightship WLV 539 |
| Linden Hill |
| Lindsay, J., Barn |
| Liston House |
| Liston Range Front Lighthouse |
| Liston Range Rear Light Station |
| Little Creek Hundred Rural Historic District |
| Logan House |
| Logan School House K-834 |
| Lore, Charles B., Elementary School |
| Lower Market Street Historic District |
| MacDonough, Comdr. Thomas, House |
| MAGGIE S. MYERS (schooner) |
| Main Office of the New Castle Leather Company |
| Maple Grove Farm |
| Marcus Hook Range Rear Light |
| Masonic Hall and Grand Theater |
| Mason, J., Farm |
| Mayfield |
| McCormack, J., Farm |
| McCoy House |
| McDaniel, J., Farm |
| McIntyre, J., Farm |
| McWhorter House |
| Mermaid Tavern |
| Meteer Store House |
Data from United States Park Service and Wikidata
