Maine - Role: Building
| Cony, Gov. Samuel, House |
| Cony High School |
| Coombs, Viola, House |
| Coplin Plantation Schoolhouse |
| Corinth Town Hall and Corinthian Lodge #59, I.O.O.F. |
| Cornish House |
| Cottage on King's Row |
| Cotton-Smith House |
| Cottrill, Matthew, House |
| Cousins Island Chapel |
| Crescent Lodge |
| Criterion Theatre |
| Crooker, W. D., House |
| Crosby Lodge |
| Cummings' Guest House |
| Cummings Shoe Factory |
| Cumston Hall |
| Curtis Island Light |
| Curtis, John B., Free Public Library |
| Cushman, Abial, Store |
| Cushman, Charles L., House |
| Cutler Memorial Library |
| Daigle, Jean-Baptiste, House |
| Dalton, Benjamin and Abigail, House |
| Damariscotta Baptist Church |
| Damariscove Lifesaving Station |
| Danville Junction Grange #65 |
| Dark Harbor Shop |
| Davis, Dalton Holmes, Memorial Library |
| Davis, John, House |
| Day, Holman, House |
| Deacon Hutchins House |
| Deering Estate Barn |
| Deering, J. G., House |
| Deering Memorial United Methodist Church |
| Deertrees Theatre |
| Dennett Garrison |
| Dexter Grist Mill |
| Dexter Universalist Church |
| Dingley, Frank L., House |
| District #5 School House |
| District No. 1 Schoolhouse |
| District No. 2 School |
| District No. 5 School |
| Division No. 9 School |
| Dix Family Stable |
| Dixmont Corner Church |
| Dixmont Town House |
| Dominican Block |
| Donnell, William T., House |
| Dorfield Farm |
| Doughty Block |
| Douglas, C. F., House |
| Dow, Gen. Neal, House |
| Dresden Brick School House |
| Dresden Town House |
| Drexel Estate |
| Dry Mills School |
| Duck Cove School |
| Dudley Block |
| Dudley's Corner School House |
| Dunlap, John, House |
| Dunn & Elliot Sail Loft |
| Dunstan Methodist Episcopal Church |
| Dyer, Nathaniel, House |
| Dyke Mountain Annex |
| Eagle Island |
| Early Post Office |
| East Blue Hill Library |
| East Blue Hill Post Office |
| Eastbrook Baptist Church and Eastbrook Town House |
| East Eddington Public Hall |
| East Harpswell Free Will Baptist Church |
| East Raymond Union Chapel |
| East Vassalboro Grist and Saw Mill |
| Eaton House |
| Eaton School |
| Edgecliff |
| Eegonos |
| Eighth Maine Regiment Memorial |
| Elden's Store |
| Elder Grey Meetinghouse |
| Ellis, Dr. J. W., House |
| Ellsworth City Hall |
| Ellsworth Congregational Church |
| Elm Hill Farm |
| Elms |
| Elms, The |
| Elm Street Congregational Church and Parish House |
| Embden Town House |
| Emery Homestead |
| Emery House |
| Emery, James, House |
| Emery School |
| Engine Company Number Nine Firehouse |
| Engine House |
| Enterprise Grange, No. 173 |
| Everett Chambers |
| Excelsior Grange #5 |
| Falmouth High School |
Data from United States Park Service and Wikidata
