Massachusetts - Role: Building
| Cary, Otis, House |
| Casey's Diner |
| Castle Hill |
| Castle Street Row |
| Castle, The |
| Cataract Engine Company No. 3 |
| Cataumet Schoolhouse |
| Cathedral of St. Paul |
| Center Depot |
| Center Methodist Church |
| Center School |
| Central Congregational Church |
| Central Congregational Church |
| Central Congregational Church |
| Central Fire Station |
| Central Fire Station |
| Central Fire Station |
| Central Fire Station |
| Central Library |
| Chace, A. B., Rowhouses |
| Chace Mills |
| Chadwick-Brittan House |
| Chadwick Square Diner |
| Chamberlain-Bordeau House |
| Chamberlain, Charles, House |
| Chamberlain-Flagg House |
| Chamberlain, Samuel, House |
| Chandler-Bigsby-Abbot House |
| Chandler, Gen. Samuel, House |
| Chandler-Hidden House |
| Chapel of St. Anne |
| Chapin, A., House |
| Chapin Block |
| Chapin National Bank Building |
| Chapin School |
| Chaplin-Clarke House |
| Charles Playhouse |
| Charles River Reservation (Speedway)-Upper Basin Headquarters |
| Charles Street African Methodist Episcopal Church |
| Charlton Mill |
| Chase-Hyde Farm |
| Chase, Lemuel B., House |
| Chase Library |
| Chase, Samuel, House |
| Chase's, Oliver, Thread Mill |
| Chatham Railroad Depot |
| Chelmsford Glass Works' Long House |
| Cheney, Alpha M., House |
| Cheney, J. M., Rental House |
| Chestnut Hill Meetinghouse |
| Chestnut Hill, The |
| Chickering House |
| Child, Francis J., House |
| Child, Isaac, House |
| Children's Home |
| Childs, Mayor Edwin O., House |
| Childs, Webster, House |
| Choate, Rufus, House |
| Christ Church |
| Christ Church |
| Christ Church |
| Christ Episcopal Church |
| Chubbuck, Thomas, Jr., House |
| Church of Christ |
| Church of Christ, Swansea |
| Church of the Ascension |
| Church of the New Jerusalem |
| Church on the Hill |
| Church, William L., House |
| Citizens Hall |
| City Hall |
| City Hall |
| City Stable and Garage |
| Claflin, Adams, House |
| Claflin-Richards House |
| Claflin School |
| Clapp, George, House |
| Clapp Houses |
| Clapp, Lucius, Memorial |
| Clark-Eames House |
| Clarke-Glover Farmhouse |
| Clarke, Pitt, House |
| Clark House |
| Clark Houses |
| Clark-Northrup House |
| Clark University |
| Cleale, Joseph, House |
| Cliff Cottage |
| Clifford-Warren House |
| Cliff, Z. E., House |
| Clinton African Methodist Episcopal Zion Church |
| Clinton Wire Cloth Company Historic District |
| Clough, Benjamin F., House |
| Cloverden |
| Cluett Peabody & Company |
| Cobb, George, House |
| Cobb Memorial Library |
| Cobb's Tavern |
| Cochran,Jehiel, House |
| Codding Farm, The |
Data from United States Park Service and Wikidata
