Maine - Role: Building
| Briggs, William, Homestead |
| Brooklin IOOF Hall |
| Brown, C. A., Cottage |
| Brown, Harrison B., House |
| Brown House |
| Brown, J. B., Memorial Block |
| Brown Memorial Library |
| Brown-Pilsbury Double House |
| Browns Head Light Station |
| Bryant, Charles G., Double House |
| Buck Memorial Library |
| Bucknam House |
| Bucknam, Samuel, House |
| Bucksport Railroad Station |
| Building at 84-96 Hammond Street |
| Burgess House |
| Burnell Tavern |
| Burnham Tavern |
| Burnt Island Light Station |
| Bussey, Louis I., School |
| Butler, A. B., House |
| Butterfield-Sampson House |
| Buxton Powder House |
| Calais Free Library |
| Camden Opera House Block |
| Camden Yacht Club |
| Campbell, Col, Samuel, House |
| Campbell, David W., House |
| Campbell, Frank, House |
| Campbell, Gen. Alexander, House |
| Camp Cinnamon |
| Camp Hammond |
| Canadian Pacific Railway Depot, Greenville Junction, Maine |
| Cape Neddick Light Station |
| Carleton, Moses, House |
| Carleton, Robert, House |
| Carrabasset Inn |
| Carr, Robert P., House |
| Carver Memorial Library |
| Cary Library |
| Caswell Public Library (Former) |
| Cate House |
| Cathedral of the Immaculate Conception |
| Central Congregational Church |
| Central Parish Church |
| Centre Street Congregational Church |
| Chaloner House |
| Chandler-Parsons Blacksmith Shop |
| Chandler Store |
| Chapman-Hall House |
| Chapman, Leonard Bond, House |
| Charlotte Pound |
| Chase, Capt. Josiah E., Octagon House |
| Chase, Hezekiah, House |
| Chase, Squire, House |
| Cherryfield Academy |
| Chestnut Street Methodist Church |
| Children's Hospital |
| Christ Church |
| Christ Episcopal Church |
| Church of Our Father |
| Church of the Advent |
| Church of the New Jerusalem |
| Clapp, Charles Q., Block |
| Clapp, Charles Q., House |
| Claremont Hotel |
| Clark, Edmund and Rachel, Homestead |
| Clary Mill |
| Clase, Nicholas P., House |
| Cleaveland, Parker, House |
| Cleaves, Benjamin, House |
| Cleftstone |
| Cleveland, Edward L., House |
| Clifford, George F., House |
| Clifford, John D., House |
| Clifford, Nathan, School |
| Cliffwood Hall |
| Clock Farm |
| Clough Meeting House |
| Cobe Estate |
| Coburn, Gov. Abner, House |
| Coffin, Stephen, House |
| Colburn House State Historic Site |
| Colburn School |
| Colburn, William, House |
| Cold Spring Farm |
| Cole Block |
| College Block-Lisbon Block |
| College Club Inn |
| Colonial Apartments |
| Colonial Theater |
| Columbia House |
| Conant-Sawyer Cottage |
| Concord Haven |
| Congregational Church of Edgecomb |
| Congregational Church of Medway |
| Connor-Bovie House |
| Connors House |
| Continental Mill Housing |
| Conway House |
Data from United States Park Service and Wikidata
