Maine - Significance region: Local
| Frenchville Railroad Station and Water Tank |
| Friends Meetinghouse |
| Frisbee, Frank C., Elementary School |
| Fryeburg Registry of Deeds |
| Fryeburg Town House, Former |
| Gallison Memorial Library |
| Garcelon, A. A., House |
| Gardiner Historic District |
| Gardiner Railroad Station |
| Garland Grange Hall |
| Gates House |
| Gaunt Neck Site Complex |
| Gay-Munroe House |
| Genthner, Ernest and Louise, House |
| Georges River Canal |
| Gerald Hotel |
| Gilead Railroad Station |
| Gilmore House |
| Glidden-Austin Block |
| Godfrey-Kellogg House |
| Goodall, Louis B., Memorial Library |
| Goodall, Thomas, House |
| Goodridge Corner School |
| Goodspeed Memorial Library |
| Goodwin, Edmund E., House |
| Goold House |
| Gordon Fox Ranch |
| Gorham Historic District |
| Gothic House, The |
| Gould House |
| Governor Brann School |
| Governors Point |
| Grace Episcopal Church |
| Grand Army Memorial Home |
| Grand, The |
| Grand Trunk Railroad Station |
| Granite Store |
| Grant Family House |
| Grant, Gooden, House |
| Grant, Peter, House |
| Grant, William F., House |
| Gray House, Old |
| Gray Memorial United Methodist Church and Parsonage |
| Great Chebeague Golf Club |
| Great Falls Historic District |
| Great Northern Paper Company Administration Historic District |
| Greenacre |
| Greene Cottage |
| Green Memorial A.M.E. Zion Church |
| Greenough, Byron, Block |
| Greenwood Cattle Pound |
| Greenwood, Chester and Isabel, House |
| Greenwood Garden Playhouse |
| Greenwood Town Hall, Former |
| Greer's Corner School |
| Griffin House |
| Grindle Point Light Station |
| Grist Mill Bridge |
| Guilford Memorial Library |
| Gushee Family House |
| Gustaf Adolph Lutheran Church |
| Gut Island Site |
| Hall, Enoch, House |
| Hall House |
| Hallowell Historic District |
| Hall's Tavern |
| Hamblen Block |
| Hamblen Development Historic District |
| Hamilton, Thomas, House |
| Hammond, Edward J., Hall |
| Hammond Street Congregation Church |
| Hampden Academy |
| Hampden Congregational Church |
| Hancock County Jail |
| Hancock Point School |
| Hanson, Asa, Block |
| Harbor Lane-Eden Street Historic District |
| Hardscrabble Farm |
| Harmony Hall |
| Harper Family House |
| Harriman School |
| Harrington Meetinghouse |
| Harris, Nathan, House |
| Hartford Fire Station |
| Harward Family House |
| Hasey's Maine Stages Building |
| Haskell, Squire Ignatius, House |
| Hathaway Barn |
| Hathorn, Lt. John, House |
| Hawkes Pharmacy |
| Hayford Block |
| Head Tide Historic District |
| Heald House |
| Healey Asylum |
| Heal Family House |
| Hemlock Bridge |
| Herald Building |
| Herbert, The |
| Hershey Plow Company Building |
| Heywood, Phineas, House |
Data from United States Park Service and Wikidata
