Massachusetts - Criteria: A (event)
| Carroll-Hartshorn House |
| Caryl, Benjamin, House |
| Case's Corner Historic District |
| Casey's Diner |
| Castle, The |
| Center Cemetery |
| Center Cemetery |
| Center Depot |
| Center Methodist Church |
| Center School |
| Centerville Historic District |
| Central Fire Station |
| Central Fire Station |
| Central Fire Station |
| Central Fire Station |
| Central Gloucester Historic District |
| Central Library |
| Central Mills Historic District |
| Central New Bedford Historic District |
| Central Square Historic District |
| Central Square Historic District |
| Central Square Historic District |
| Central Square Historic District |
| Central Street District |
| Central Street Historic District |
| Central Woolen Mills District |
| Centre and Montello Streets Historic District |
| Chadwick Square Diner |
| Chamberlain-Bordeau House |
| Chamberlain-Flagg House |
| Chandler-Bigsby-Abbot House |
| Chapin Block |
| Chapin National Bank Building |
| Chapin School |
| Chaplin-Clarke House |
| Charlemont Village Historic District |
| Charles Playhouse |
| Charles River Basin Historic District |
| Charles River Reservation Parkways |
| Charles River Reservation (Speedway)-Upper Basin Headquarters |
| Charles Street African Methodist Episcopal Church |
| Charles Street Workers' Housing Historic District |
| Charlestown Heights |
| Charlton Center Historic District |
| Charlton Mill |
| Charter Street Historic District |
| Chase-Hyde Farm |
| Chase Library |
| Chase's, Oliver, Thread Mill |
| Chatham Light Station |
| Chatham Railroad Depot |
| Chatham Windmill |
| Chelmsford Glass Works' Long House |
| Chelsea Garden Cemetery |
| Cheney, Alpha M., House |
| Cheney, J. M., Rental House |
| Cheshire Town Hall Complex |
| Chester Center Historic District |
| Chester Factory Village Historic District |
| Chesterfield Center Historic District |
| Chestnut Hill Historic Distric |
| Chestnut Hill Meetinghouse |
| Chestnut Hill Reservoir Historic District |
| Chestnut Street District |
| Chickatawbut Observation Tower |
| Children's Home |
| Childs, Webster, House |
| Choate Bridge |
| Christ Church Burial Ground |
| Christ Episcopal Church |
| Church Green |
| Church Green Buildings Historic District |
| Church-Lafayette Streets Historic District |
| Church of Christ, Swansea |
| Church of the Ascension |
| Church on the Hill |
| Church Street Historic District |
| Church Street Historic District |
| Church Street Historic District |
| Church, William L., House |
| City Hall |
| City Hall |
| City Hall Historic District |
| City Stable and Garage |
| Claflin-Richards House |
| Claflin School |
| Clapp, George, House |
| Clapp, Lucius, Memorial |
| Clarke-Glover Farmhouse |
| Clarke, Pitt, House |
| Clark University |
| Cleveland Ledge Light Station |
| Cliff Cottage |
| Clifford-Warren House |
| Clinton African Methodist Episcopal Zion Church |
| Clough, Benjamin F., House |
| Cloverden |
| Cluett Peabody & Company |
| Coast Guard Motor Lifeboat CG 36500 |
| Cobb Memorial Library |
Data from United States Park Service and Wikidata
