Arkansas - Criteria: C (architecture/engineering)
| Smith, William H., House |
| Smyrna Methodist Church |
| Smyth, Peter, House |
| Snipes, Dr. Emmett, House |
| Snyder House |
| Solomon Grove Smith-Hughes Building |
| Son's Chapel |
| Sorrells, Walter B., Cottage |
| Southern Mercantile Building |
| Southern Trust Building |
| South Fork Bridge |
| South Main Street Apartments Historic District |
| South Main Street Commercial Historic District |
| South Main Street Residential Historic District |
| South Scott Street Historic District |
| South Side Baptist Church |
| Southwestern Proving Ground Building No. 129 |
| Southwestern Proving Ground Building No. 4 |
| Southwestern Proving Ground Building No. 5 |
| Sparks, James, House |
| Spears House |
| Springfield Bridge |
| Spring Lake Bridge |
| Spring Lake Recreation Area Historic District |
| Spring Mill |
| Spring River Bridge |
| Stack Barn |
| Staggs-Huffaker Building |
| St. Agnes Catholic Church |
| Stamps Store |
| Standard Ice Company Building |
| Star City Commercial Historic District |
| State Highway 274 Bridge |
| State Highway 96 Bridge |
| St. Barnabas Episcopal Church |
| Steamboat House |
| Stebbins and Roberts Office Building and Factory |
| St. Edwards Church |
| Stegall General Store |
| St. Elizabeth's Catholic Church |
| Stewart House |
| St. Francis River Bridge |
| St. Francis River Bridge |
| Stifft Station Historic District |
| Stipe Cotton Gin |
| Stitt House |
| St. Joe Missouri and North Arkansas Railroad Depot |
| St. John's Episcopal Church |
| St. John the Baptist Catholic Church |
| St. Joseph's Home |
| St. Louis San Francisco (Frisco) Railway Coach #661 |
| St. Louis San Francisco (Frisco) Railway Steam Locomotive #4003 |
| St. Louis-San Francisco Overpass |
| St. Louis Southwestern Railway (Cotton Belt Route) Caboose #2325 |
| St. Louis Southwestern Railway (Cotton Belt Route) Relief Train |
| St. Louis Southwestern Railway (Cotton Belt Route) Steam Locomotive #336 |
| St. Louis Southwestern Railway Steam Locomotive #819 |
| St. Luke's Catholic Church |
| St. Luke's Episcopal Church |
| St. Mark's Episcopal Church |
| St. Mary's Catholic Church |
| St. Mary's Catholic Church |
| St. Mary's Episcopal Church |
| Stockton Building |
| Stokes, Fremont, House |
| Stokes House |
| Stone County Courthouse |
| Stone House |
| Stone, William, House |
| Storm Cellar, William Howell House |
| Stowers, Dan, Office Building |
| St. Paul Lutheran School |
| St. Paul School Building |
| St. Paul's Parish Church |
| Straub, William Nicholas, House |
| Strauss House |
| Strauss, Sam and Shirley, House |
| St. Richard's Catholic Church |
| Stroud House |
| Studebaker Showroom |
| Student Union Building-University of Arkansas, Fayetteville |
| Stuttgart Commercial Historic District |
| Sugar Creek Vista Overlook |
| Sugarloaf Fire Tower Historic District |
| Sulphur Springs Old School Complex Historic District |
| Sulphur Springs Park Reserve |
| Sutherlin Cabin |
| Swift Building |
| Sylamore Creek Bridge |
| Tall Peak Fire Tower |
| Tall Pines Motor Inn |
| Tankersley-Stewart House |
| Tappan, James C., House |
| Tappan, Maj. James Alexander, House |
| Tate's Barn |
| Tate's Bluff Fortification |
| Tavern, The |
| Taylor Building |
| Taylor Field |
| Taylor Log House and Site |
Data from United States Park Service and Wikidata
