Delaware - Architectural style - Federal architecture
| Armstrong-Walker House |
| Biddle House |
| Brook Ramble |
| Brown, Dr. John A., House |
| Cloud, Abner, House |
| Davis, Thomas, House |
| Dodd Homestead |
| Green Meadow |
| Hersey-Duncan House |
| Hill, Robert, House |
| La Grange |
| Lower Louviers and Chicken Alley |
| Meeteer House |
| Pepper, Carlton, David, Farm |
| Ricards House-Linden Hall |
| Richards Mansion |
| Springer, Charles, Tavern |
| Spring Garden |
| Starl House |
| Sudler House |
| Thomas, David W., House |
| Vandyke-Heath House |
| Williams, James, House |
| Windsor |
Data from United States Park Service and Wikidata
