All - Architectural style - Romanesque Revival architecture
| Congress Street Fire Station |
| Connell, William M., School |
| Connor House |
| Convent and Academy of the Visitation |
| Convent of the Sisters of St. Joseph Carondelet |
| Conventual Church of St. Mary and St. John |
| Converse Memorial Building |
| Coraopolis Railroad Station |
| Corbin Building |
| Corpus Christi Church |
| Corpus Christi R.C. Church Complex |
| Corry Armory |
| Coryell County Courthouse |
| Cote Bonneville |
| Coughlin School |
| Court Exchange Building-National Casket Company |
| Cox Building |
| Cox Furniture Warehouse |
| Craig, William Houston, House |
| Crane, Thomas, Public Library |
| Crawford Building |
| Crawford House |
| Crescent Hotel |
| Crogman, William H., School |
| Crook County Bank Building |
| Crowninshield House |
| C.S.P.S. Hall |
| Cumberland Presbyterian Church |
| Cupples, Samuel, House |
| Curtis Building |
| Curtis Mansion |
| Dakota County Courthouse |
| Dallas County Courthouse |
| Davenport Crematorium |
| Davis Block |
| Davol School |
| Dawson Armory and Community Building |
| Dawson School |
| Day Building |
| Dearborn Station |
| Decatur County Courthouse |
| Degive's Grand Opera House |
| Deke House |
| Dekum, The |
| Delano Village Hall |
| Delaware County Courthouse |
| Delaware & Hudson Railroad Depot |
| Delevan Baptist Church |
| Del Monte Apartments |
| Delta County Bank Building |
| Demarest Railroad Depot |
| Denton County Courthouse |
| Denton County Courthouse Square Historic District |
| Denver Athletic Club |
| Derham Hall and Our Lady of Victory Chapel, College of St. Catherine |
| Desha County Courthouse |
| Devine Opera House |
| Devinne Press Building |
| Dey Building |
| Dick Block, The |
| Dick Building |
| Dickinson County Courthouse and Jail |
| Dillon City Library |
| Dime Bank Building |
| District No. 2 School, Caroline and Dryden |
| Dixon-Duncan Block |
| Dixon-Globe Opera House-Robinson-Schwenn Building |
| Dixon, John, House |
| Doddridge County Courthouse |
| Donaghy, Thomas, School |
| Doniphan County Courthouse |
| Donley County Courthouse and Jail |
| Dooly County Courthouse |
| Douglas County Courthouse |
| Douglas, John S., House |
| Dousman Hotel |
| Downing Street School |
| Drayton United Methodist Church |
| Driscoll's Block |
| Driskill Hotel |
| Dubuque Star Brewery |
| Duluth Central High School |
| Duluth Missabe and Iron Range Depot (Endion) |
| Dumbarton Bridge |
| Dunbar Hospital |
| Dunning-Benedict House |
| Dunstable Town Hall |
| Duquesne Brewing Company |
| Dwight Chicago and Alton Railroad Depot |
| Earl, Gardner, Memorial Chapel and Crematorium |
| East Broad Street Presbyterian Church |
| East Capitol Street Carbarn |
| East Dubuque School |
| East End Drugs |
| Eastern Avenue School |
| Eastern Star Hall |
| East Liberty School, District No. 11 |
| East Palmyra Presbyterian Church |
| East Side Presbyterian Church |
| Eaton Elementary School |
Data from United States Park Service and Wikidata
