Colorado - Area of significance: Architecture
| Downtown Denver Central YMCA and Annex |
| Dow-Rosenzweig House |
| Doyle-Benton House |
| Doyle Settlement |
| Drennan School |
| Duck Creek Wickiup Village |
| Duke, Nathaniel W., House |
| Dumont School |
| Dunning-Benedict House |
| Dunraven Cottage-Camp Dunraven |
| Dunwoody, William J., House |
| Durango High School |
| Dutzi, Howard & Ruth, House |
| Dyer, Samuel, House |
| Eads Community Church |
| Earl School |
| Earnest Ranch |
| East High School |
| East Side Historic District |
| East Street School |
| East Third Avenue Historic Residential District |
| Eaton, Aaron James, House |
| Echo Lake Park |
| Edgemont |
| Edgeplain |
| Edgerton House |
| Edison School |
| Eldora Historic District |
| Eleventh Avenue Hotel |
| Elitch Gardens Carousel |
| Elitch Theatre |
| Elkhorn Lodge |
| El Monte Hotel |
| El Paso County Courthouse |
| El Pomar Estate |
| El Pueblo |
| Elsner, John, House |
| Emerick, Charles, House |
| Emerson School |
| Emily Griffith Opportunity School |
| Emmanuel Presbyterian Church |
| EM Ranch |
| Englewood Post Office |
| Enterprise Hill Historic District |
| Entrance Residence, Check Station Residence |
| Eppich Apartments |
| Equitable Building |
| Ertel Funeral Home |
| Escalante Ruin |
| Estabrook Historic District |
| Evans, Anne, Mountain Home |
| Evans-Elbert Ranch |
| Evans Homestead Rural Historic Landscape |
| Evans, J.G., Barn |
| Evans School |
| Evergreen Cemetery |
| Evergreen Corner Rural Historic District |
| Fairplay Hotel |
| Fall River Entrance Historic District |
| Fall River Pass Historic District |
| Fall River Pass Ranger Station |
| Fall River Pump House and Catchment Basin |
| Farmers State Bank Building |
| Farmers State Bank of Cope |
| Fay, William and Anna, House |
| Fetz-Keller Ranch Headquarters |
| Field, Eugene, House |
| Fillius Park |
| Finney, Dr. Frank, House |
| Fire Station No. 1 |
| Fire Station No. 3 |
| First Avenue Hotel |
| First Baptist Church |
| First Baptist Church |
| First Baptist Church |
| First Baptist Church of Boulder |
| First Baptist Church of Denver |
| First Baptist Church of Moffat |
| First Christian Church |
| First Congregational Church |
| First Congregational Church |
| First Congregational Church |
| First Congregational Church |
| First Congregational Church of Lyons |
| First Evangelical Lutheran Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church |
| First Methodist Episcopal Church of Delta |
| First National Bank Building |
| First National Bank Building |
| First National Bank Building |
| First National Bank of Douglas County |
| First National Bank of Haxtun |
| First Presbyterian Church |
| First Presbyterian Church of Eckert |
| First Presbyterian Church of Golden-Unger House |
| First Presbyterian Church of Ramah |
Data from United States Park Service and Wikidata
