Colorado - Area of significance: Commerce
| Henkel-Duke Mercantile Company Warehouse |
| Hotchkiss Hotel |
| Hotel de Paris |
| Hotel Holly-Haswell Hotel |
| Hotel Jerome |
| Hotel Meeker |
| Hotel St. Regis |
| Hover, W.A., and Company Building |
| Howard Store |
| Hudson, Sim, Motor Company |
| Humboldt Street Historic District |
| Hyman-Brand Building |
| Idaho Springs Downtown Commercial District |
| Ideal Building |
| Jacobs Building |
| Jacoe Store |
| Jaffa Opera House |
| Joslin Dry Goods Company Building |
| Julien, Denis, Inscription |
| Kauffman House |
| Keating, Jeffery and Mary, House |
| Key Savings and Loan Association Building |
| Keystone Hotel |
| Kistler Stationery Company Building |
| Kohn House |
| Kopper's Hotel and Saloon |
| La Jara Depot |
| Lake City Historic District |
| Larimer Square |
| La Vista Motel |
| Leeman Auto Company Building |
| Lett Hotel |
| Lewis, A. T., and Son Department Store |
| Littleton Main Street |
| Livermore Hotel and General Store |
| Livestock Exchange Building |
| Loveland Building and Coors Building |
| Lyons Railroad Depot |
| Lyons Sandstone Buildings |
| Main Avenue Historic District |
| Maitland Estate |
| Marble City State Bank Building |
| Margery Building |
| Maxwell Building |
| McClintock Building |
| McClure House |
| McHugh-Andrews House |
| Meeker Historic District |
| Midland Savings Building |
| Midwest Steel and Iron Works Company Complex |
| Mint Saloon |
| Mitchell Springs Archeological Site |
| Montezuma Valley National Bank and Store Building |
| Montgomery Ward Building |
| Montoya Ranch |
| Montrose Fruit & Produce Association Building |
| Morrison Historic District |
| National Fuel Company Store |
| Neef, Frederick W., House |
| Neusteter Building |
| Newman Block |
| Old Colorado City Historic Commercial District |
| Old Highland Business District |
| Old Town Fort Collins |
| Ottesen Grain Company Feed Mill |
| Oxford Hotel |
| Oxford Hotel |
| Palace Hotel |
| Peck House |
| Peters Paper Company Warehouse |
| Pryor, Frank, House |
| Quaker Flour Mill |
| Robison Mansion |
| Rochester Hotel |
| Rock Creek Stage Station |
| Rocky Mountain Bank Note Company Building |
| Rosemount |
| Routt County National Bank Building |
| Royal Gorge Bridge and Incline Railway |
| Ruble-Orendorf Mercantile |
| Russell Gulch I.O.O.F. Hall No. 47-Wagner and Askew |
| Saguache Downtown Historic District |
| Salida Downtown Historic District |
| Salida Livestock Commission Company |
| Santa Fe Trail Mountain Route-Bent's New Fort |
| Santa Fe Trail Mountain Route Trail Segment-Delhi Vicinity I |
| Santa Fe Trail Mountain Route Trail Segment-Delhi Vicinity II |
| Santa Fe Trail Mountain Route Trail Segment-Delhi Vicinity III |
| Santa Fe Trail Mountain Route Trail Segments-Bloom Vicinity |
| Santa Fe Trail Mountain Route Trail Segments-Iron Springs Vicinity |
| Santa Fe Trail Mountain Route Trail Segments-Timpas Vicinity |
| Schleier, George, Mansion |
| Schlessinger House |
| Sherman and Ross Block Building |
| Shirley Hotel |
| Smith, Edwin L. Building |
| Smith-Eslick Cottage Court |
| Southern Hotel |
| Squires-Tourtellot House |
| Stanley Hotel |
Data from United States Park Service and Wikidata
