Connecticut - Role: Building
| First National Bank Building |
| Fish, Abel H., House |
| Fitch, John, School |
| Florence Mill |
| Footguard Hall |
| Forbes, Samuel, Homestead |
| Ford, Elinor and Sherman, House |
| Forestville Passenger Station |
| Former Fire Station |
| Fort Griswold |
| Fort Trumbull |
| Foster, Stephen and Helen, House |
| Fourth Congregational Church |
| Fourth District School |
| Freeman, Mary and Eliza, Houses |
| French Farm |
| Frisbie, Edward, Homestead |
| Frisbie, Edward, House |
| Frost, Levi B., House |
| Fuller, John, House |
| Fyler-Hotchkiss Estate |
| Gay, Ebenezer, House |
| George A. and Jennie Curtis Fay House |
| Gilbert Clock Factory |
| Gillett, Asa, House |
| Gillette, Francis, House |
| Gillette's Grist Mill |
| Gilman-Hayden House |
| Glebe House |
| Glenville School |
| Glover House |
| Glover, John, House |
| Godillot Place |
| Goffe, Solomon, House |
| Goffe Street Special School for Colored Children |
| Goodman, Timothy, House |
| Goodspeed Opera House |
| Gores, Landis, House |
| Gorton, William, Farm |
| Gothic Cottage |
| Gould House |
| Gov. Smith Homestead |
| Grace Church Rectory |
| Graham House |
| Grannis, Stephen, House |
| Grant, Ebenezer, House |
| Great Captain Island Lighthouse |
| Green Farms School |
| Greenfield Hill Grange #133 |
| Greenwich Town Hall |
| Greenwich YMCA |
| Gridley-Parsons-Staples Homestead |
| Griswold, Florence, House and Museum |
| Griswold House |
| Gwyn Careg |
| Hait, Benjamin, House |
| Hale, Dr. Elizur, House |
| Hale, Nathan, Homestead |
| Hall-Benedict Drug Company Building |
| Hall, Isaac Davis and Marion Dalton, House |
| Halpine, J. S., Tobacco Warehouse |
| Hamden Bank & Trust Building |
| Hamden High School |
| Hamden Memorial Town Hall |
| Hampton Inn |
| Harris, Jonathan Newton, House |
| Harrison, Thomas, House |
| Harry O. Erikson Pavilion Hall |
| Hartford Club |
| Hartford Electric Light Company Maple Avenue Sub-Station |
| Hartford National Bank and Trust |
| Hartford & New Haven Railroad Depot |
| Hartford & New Haven Railroad-Freight Depot |
| Hartford Seminary Foundation |
| Hartford Union Station |
| Hart, Gen. William, House |
| Hart, Timothy, House |
| Harvey, William H., House |
| Hathaways Store |
| Hatheway House |
| Hawley, Thomas, House |
| Hayden, Capt. Nathaniel, House |
| Hayes, Samuel II, House |
| Hayward House |
| Hazelton, James, House |
| Hearthstone |
| Hebrew Congregation of Woodmont |
| Hempstead, Joshua, House |
| Hempsted, Nathaniel, House |
| Heublein Tower |
| Hibbard, Enoch, House and Grannis, George, House |
| Hill's Academy |
| Hillside |
| Hill-Stead |
| Hine-Buckingham Farms |
| Hitchcock-Schwarzmann Mill |
| Hoadley, Isaac, House |
| Hoadley, John, House |
| Hoadley, Orrin, House |
| Hodgson, Richard and Geraldine, House |
Data from United States Park Service and Wikidata
