Montana - Criteria: C (architecture/engineering)
| Quartz Lake Patrol Cabin |
| Rahrer, Francis, House |
| Railroad Depot |
| Rainbow Conoco |
| Randall, Harry E., House |
| Ravalli County Courthouse |
| Raymond Grain Elevators Historic District |
| Recreation Hall |
| Red Lodge Commercial Historic District |
| Red Lodge Communal Mausoleum |
| Red Lodge-Cooke City Approach Road Historic District |
| Reed's Fort Post Office |
| Reese Creek School |
| Reid House |
| Reno Apartments |
| Rialto Theater |
| Ringleberg, Cornelius, House |
| Rising Sun Auto Camp |
| Rising Wolf |
| Riverside |
| Robinson, Fred, Bridge |
| Rock Creek State Bank |
| Roes Creek Campground Camptender's Cabin |
| Rogers House |
| Rolfson House |
| Roose-Eckelberry House |
| Rosebud County Courthouse |
| Rossiter, H. D., Building |
| Rouse House |
| Rundle Building |
| Ruth, Harold and Marion, House |
| Sacajawea Hotel |
| Sacred Heart Church |
| Saint John the Baptist Catholic Church |
| Saint Mary of the Assumption |
| Saint Mary Ranger Station |
| Saint Mary Visitor Center, Entrance Station and Checking Stations |
| Sanders County Jail |
| Sanders Gynmasium and Community Hall |
| Sandstone and Cobblestone Schools |
| Sauser-Mercord Building |
| Savenac Nursery Historic District |
| Scalplock Mountain Fire Lookout |
| Scenic Bridge |
| Scherlie, Anna, Homestead Shack |
| Schroeder Hospital |
| Scott-Forhan House |
| Sharp, John, House |
| Sheehan Boardinghouse |
| Sheep Creek Bridge |
| Sherburne Ranger Station Historic District |
| Sherman, Byron R., House |
| Sherwood Lodge |
| Shore, Thomas and Beulah, House |
| Silver Bow County Poor Farm Hospital |
| Silver King Ranch |
| Silverman, Morris, House |
| Sims-Garfield Ranch |
| Skyland Camp-Bowman Lake Ranger Station |
| Slayton Mercantile Co. |
| Smith House |
| Snell, Walrond and Elizabeth, House |
| Snyder House |
| Soldiers' Home Historic District |
| Southern Hotel |
| Spalding-Gunn House |
| Spannring, John Otto, Family Farm |
| Sperry Chalets |
| Spieth and Krug Brewery |
| Spieth Houses |
| Springhill School |
| Square Butte Jail |
| Square Butte School |
| Stafford's Grocery |
| Stark School |
| State Bank of Townsend |
| Stateler Memorial Methodist Church |
| St. Benedict's Catholic School |
| Stearns Hall |
| Sterling, Fred T., House |
| Stevensville Grade School-United Methodist Church |
| St. Francis Xavier Church |
| St. Ignatius Mission |
| St. James Episcopal Church and Parish House |
| St. James Episcopal Church and Rectory |
| St. Joseph Catholic Church |
| St. Joseph's Catholic Church |
| St. Joseph's Catholic Mission Church |
| St. Joseph's Hospital |
| St. Leo's Catholic Church |
| St. Mark's Episcopal Church |
| St. Mark's Episcopal Church |
| St. Mary Peak Lookout |
| St. Mary Utility Area Historic District |
| Stockmen's Bank of Martinsdale |
| Stoltz House |
| Stout, John, House |
| St. Paul's Episcopal Church |
| St. Peter's Catholic Church |
| St. Peter's Mission Church and Cemetery |
Data from United States Park Service and Wikidata
