Oklahoma - Criteria: C (architecture/engineering)
| Roff Armory |
| Rogers, Will, Birthplace |
| Roosevelt Elementary School |
| Rosenstein Building |
| Sacred Heart Catholic Church and Rectory |
| Santa Fe Depot |
| Santa Fe Depot |
| Santa Fe Depot |
| Santa Fe Depot of Lindsay |
| Sayre Champlin Service Station |
| Sayre City Park |
| Sayre Downtown Historic District |
| Sayre-Mann House |
| Sayre Rock Island Depot |
| Science Hall |
| Scottish Rite Temple |
| Seay Mansion |
| Security National Bank |
| Seminole County Courthouse |
| Severs Hotel |
| Shady Point School |
| Sheets House |
| Sinclair Service Station |
| Skirvin Hotel |
| Snow School |
| Sod House |
| Soldani Mansion |
| Sooner Co-op Association Elevator (West) |
| Sooner Theater Building |
| Southridge Addition Historic District |
| Southwestern Bell Main Dial Building |
| Southwestern Bell Telephone Building |
| Spanish Village Historic District |
| Spaulding School Gymnasium-Auditorium |
| Speer School |
| Squirrel Creek Bridge |
| St. Anthony's Catholic Church |
| St. Cloud Hotel |
| Stein, L. L., House |
| St. Gregory's Abbey and College |
| Stigler School Gymnasium-Auditorium |
| St. Joseph Convent and Academy |
| St. Joseph's Cathedral |
| St. Joseph's Catholic Church |
| Storm House |
| St. Paul's Cathedral |
| Strother Memorial Chapel |
| Stroud, James W., House |
| Stroud School, Old |
| Stroud Trading Company Building |
| St. Stephen's Episcopal Church |
| Sugg Clinic |
| Summerfield School |
| Surety Building |
| Swan Lake Historic District |
| Taft Junior High School |
| Tahlequah Armory |
| Territorial Commercial District |
| Terry House |
| Texaco Service Station |
| Texas County Courthouse |
| Thompson, Joseph M., House |
| Threatt Filling Station |
| Tillman County Courthouse |
| Tishomingo Armory |
| Tonkawa Armory |
| Tonkawa Lodge No. 157 A.F. & A.M. |
| Tracey Woodframe Grain Elevator |
| Tracy Park Historic District |
| Travertine Nature Center |
| Tribune Building |
| Trumbo, A. C., House |
| Tucker School |
| Tulsa Fire Alarm Building |
| Tulsa Municipal Building |
| Turner House |
| Turner, John E., House |
| Turpin Grain Elevator |
| Twyman Park |
| Union Depot |
| United Founders Life Tower |
| United States Post Office and Courthouse |
| United States Post Office and Courthouse |
| United States Post Office Coalgate |
| United States Post Office Hollis |
| United States Post Office Madill |
| United States Post Office-Norman |
| United States Post Office Nowata |
| United States Post Office Watonga |
| US Highway 77 Bridge at Canadian River |
| US Post Office and Federal Courthouse |
| Veasey, James Alexander, House |
| Verden Separate School |
| Vici M-K-T Depot |
| Wagner, J. H., House |
| Wagoner Armory |
| Walters Rock Island Depot |
| Warden's House |
| Warwick School |
| Washita County Courthouse |
Data from United States Park Service and Wikidata
