Massachusetts - Area of significance: Architecture
| Corcoran School |
| Corey, Timothy, House No. 1 |
| Corey, Timothy, House No. 2 |
| Cornell Mills |
| Corner Lunch |
| Corning, Samuel, House |
| Cottage Farm Historic District |
| Cottage-Freeman Historic District |
| Cotting, John, House |
| Cotuit Historic District |
| Coughlin School |
| County Street Historic District |
| Court Square Historic District |
| Cove Street Historic District |
| Cowdrey, George, House |
| Cowdry, Jonas, House |
| Cowdry, Nathaniel, House |
| Crabtree, Thomas, Three-Decker |
| Crafts Street City Stable |
| Craigie Arms |
| Craigville Historic District |
| Cranch School |
| Crane, Frank W., House |
| Cranesville Historic District |
| Crane, Thomas, Public Library |
| Crawford, Elias, House |
| Crawford Street Historic District |
| Crescent Mill |
| Crimmins, Thomas A., House |
| Crocker, Benomi and Barnabas, House |
| Crocker, Capt. Alexander, House |
| Crocker, Ebenezer, Jr., House |
| Crocker Field Historic District |
| Crocker, Lot, House |
| Crombie Street District |
| Crompton Loom Works |
| Crosby, Daniel, House |
| Crowell-Bourne Farm |
| Crowell, C. C., House |
| Crowell-Smith House |
| Crowley House |
| Crowninshield House |
| Crystal Lake and Pleasant Street Historic District |
| Crystal Street Historic District |
| Cummings, E. B., House |
| cummings, e.e., House |
| Curtis Building |
| Curtis, Noah, House |
| Curtis, Paul, House |
| Curtis, Thomas, House |
| Curtis, William, House |
| Cushing, Caleb, House and Farm |
| Cushing Homestead |
| Cushman House |
| Cushman Village Historic District |
| Custom House District |
| Cutler and Porter Block |
| Cutter, Ephraim, House |
| Cutter, Gershom, House |
| Cutter, Jefferson, House |
| Cutter, Second, A. P., House |
| Cyclorama Building |
| Cypress-Emerson Historic District |
| Dale and Ethan Allen Streets Historic District |
| Dalton Grange Hall No. 23 |
| Dalton House |
| Damon House |
| Damon, Joseph, House |
| Damon Mill |
| Damon, Washington, House |
| Dana-Palmer House |
| Dani and Soldani Cabinet Makers and Wood Workers Factory |
| Daniels, Blake, Cottage |
| Daniels, Charles A., School |
| Daniels, Frederick, House |
| Dartmouth Street School |
| Dascomb House |
| Davenport Estate Historic District |
| David S. Lynch Memorial Park |
| Davidson, Sarah, Apartment Block |
| Davis, Dr. Frank, House |
| Davis, Ephraim, House |
| Davis-Freeman House |
| Davis, Isaac, House |
| Davis, Joseph, House |
| Davis, Robert S., House |
| Davis, Rodney, Three-Decker |
| Davis, Seth, House |
| Davis, Thomas Aspinwall, House |
| Davis, Wesley, Three-Decker |
| Davol School |
| Davol, William C., Jr., House |
| Dawson Building |
| Day, Anna, House |
| Day Building |
| Day Estate Historic District |
| Day, Fred Holland, House |
| Day, Josiah, House |
| Dean, Abiezar, House |
| Dean-Barstow House |
Data from United States Park Service and Wikidata
