Idaho - Significance region: Local
| Caldwell Residential Historic District |
| Callen, Dick, House |
| Cambridge News Office |
| Campbell, Harry and Fern, House |
| Campbell's Ferry |
| Canyonside School |
| Capitol Boulevard Memorial Bridge |
| Carey Dome Fire Lookout |
| Carnegie Library |
| Catholic Church of the Sacred Heart |
| Cavanah, C. C., House |
| Cave Lake School |
| Cedar Draw School |
| Cedar Mountain School |
| Challis Cold Storage |
| Challis High School |
| Chamberlain Ranger Station Historic District |
| Chase, Eben S. and Elizabeth S., House |
| Children's Home Finding and Aid Society of North Idaho |
| Chinese Cemetery |
| Chinese Mining Camp Archeological Site |
| Chinese Odd Fellows Building |
| Chivers, Bill, House |
| Chivers, Thomas, Cellar |
| Chivers, Thomas, House |
| Citizens State Bank |
| Clayton, Russell, Bungalow |
| Coeur d'Alene City Hall |
| Coeur d'Alene Garden District Historic District |
| Coffin, Henry, House |
| Cold Meadows Guard Station |
| Cole School and Gymnasium |
| Collister School |
| Commercial Historic District |
| Cooke, E. V., House |
| Cook, Joseph, House |
| Cook, William H., Water Tank House |
| Co-op Gas & Supply Company |
| Cordelia Lutheran Church |
| Cougar Gulch School III |
| Council Ranger Station |
| Cox Barn |
| Crabtree, Glen and Addie, Cabin |
| Crane, Silas W., and Elizabeth, House |
| Custer County Jail |
| Custer Slaughter House |
| Daly, John, House |
| Daniels, O. J., House |
| Darrah, Ben, Water Tank and Well House |
| Darrah House and Water Tank House |
| Dau-Webbenhorst Barn |
| Davey, Harvey M., House |
| Davids' Building |
| Davies, Dr. James, House |
| Davie, William, House |
| Davis, E. F., House |
| Davis, R. K., House |
| Day, Ivan W., House |
| Deary Garage |
| Deep Creek Ranger Station |
| Deesten Farmstead |
| Dewey, E. H., Stores |
| Dill, Charles W., House |
| Dorman, Henry W. and Ida Frost, House |
| Doughty, George V., House and Garage |
| Douglas-Farr Building |
| Dover Church |
| Drake, Col. C. F., House |
| Dry Creek Rockshelter |
| Dunbar, William, House |
| Dunton, Minnie Preist, House |
| Duquesne, Achille, House |
| Eagle Adventist Schoolhouse |
| Eastern Idaho District Fair Historic District |
| East Hayden Lake School II |
| East Side Downtown Historic District |
| Echevarria, Pedro, House |
| Edwards-Gillette Barn |
| Eichelberger Apartments |
| Eleventh Street Historic District |
| Elk City Wagon Road-Vicory Gulch-Smith Grade Segment |
| Emmett Presbyterian Church |
| Empire School |
| Enders Hotel |
| Epperson, George, House |
| Erdman, G. H., House |
| Eskelton, Alvin, Barn |
| Falls City School House |
| False-Front Commercial Building |
| Farmers and Merchants Bank Building |
| Father Lobell House |
| Featherville School |
| Feehan, John C., House |
| Finch, John A., Caretaker's House |
| Firebird Raceway |
| First Presbyterian Church |
| Fisher, James M., House |
| Fleharty, Alva, House |
| Fort Street Historic District |
| Forty-Four and Sixty-Six Service Station |
Data from United States Park Service and Wikidata
