| Sagebrush Philosophy magazine | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Sailors, Kenny | Encyclopedia | Ryan Thorburn | 
          
                                                                                        | Sailors, Kenny oral history | Oral Histories | Wyoming State Archives | 
          
                                                                                        | Saleratus Lake, Oregon Trail site of | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Saleratus Lakes | Field Trip |  | 
          
                                                                                        | Salt Creek Museum | Field Trip |  | 
          
                                                                                        | Salt Creek Oil Field | Encyclopedia | Tom Rea | 
          
                                                                                        | Salt Creek Oil Field | Field Trip |  | 
          
                                                                                        | Sarah Thomas grave | Encyclopedia | Randy Brown | 
          
                                                                                        | Saratoga and Encampment Valley Railroad | Encyclopedia | Lori Van Pelt | 
          
                                                                                        | Saratoga Museum | Field Trip |  | 
          
                                                                                        | Saratoga National Fish Hatchery | Field Trip |  | 
          
                                                                                        | Saratoga Sun | Field Trip |  | 
          
                                                                                        | Saratoga, Wyoming, history of | Encyclopedia | Lori Van Pelt | 
          
                                                                                        | Saratoga-Platte Valley Chamber of Commerce | Field Trip |  | 
          
                                                                                        | Sawyers Expedition, 1865 | Encyclopedia | Justin Horn | 
          
                                                                                        | Sawyers, James A. | Encyclopedia | Justin Horn | 
          
                                                                                        | Schneider, Adam, Featherweight Boxer | Oral Histories | Washakie Museum and Cultural Center | 
          
                                                                                        | Second Baptist Church, Rock Springs | Encyclopedia | Brigida R. (Brie) Blasi | 
          
                                                                                        | Sellett, Mike, Jackson Hole News publisher | Encyclopedia | Kerry Drake | 
          
                                                                                        | Seminoe Cutoff | Encyclopedia | Randy Brown | 
          
                                                                                        | Seminoe Cutoff | Field Trip |  | 
          
                                                                                        | Seminoe Dam, History of | Encyclopedia | Annette Hein | 
          
                                                                                        | Seminoe Dam, Kortes Dam | Field Trip |  | 
          
                                                                                        | Seminoe State Park | Field Trip |  | 
          
                                                                                        | Sheep Business in Wyoming | Encyclopedia | Samuel Western | 
          
                                                                                        | Sheep Creek Cemetery | Field Trip |  | 
          
                                                                                        | Sheepeaters | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Shepard, Matthew, Legacy of | Encyclopedia | Jason Marsden | 
          
                                                                                        | Shepard, Matthew, Murder of | Encyclopedia | Jason Marsden | 
          
                                                                                        | Shepperson, Frank, oral history | Oral Histories | Mark Junge | 
          
                                                                                        | Sheridan County Coal Camps | Encyclopedia | Kevin Knapp | 
          
                                                                                        | Sheridan County, Wyoming | Encyclopedia | Brodie Farquhar | 
          
                                                                                        | Sheridan Inn | Field Trip |  | 
          
                                                                                        | Sheridan, Wyoming | Encyclopedia | Gregory Nickerson | 
          
                                                                                        | Shoshone Cavern National Monument | Encyclopedia | Phil Roberts | 
          
                                                                                        | Shoshone Irrigation District | Field Trip |  | 
          
                                                                                        | Shoshone Reservation, 1905 Land Cession Agreement | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Siberia, 2nd Lt. Paul Kendall’s service in, 1919-1920 | Encyclopedia | Douglas R. Cubbison | 
          
                                                                                        | Sidon Canal Historic Marker/Prayer Rock | Field Trip |  | 
          
                                                                                        | Simpson, Milward | Encyclopedia | Wyoming State Archives | 
          
                                                                                        | Simpson, Milward - interview | Oral Histories | Wyoming State Archives | 
          
                                                                                        | Simpson, Milward and the death penalty | Encyclopedia | Robin Everett | 
          
                                                                                        | Simpson’s Hollow | Field Trip |  | 
          
                                                                                        | Simpson’s Hollow | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Site of the Wagon Box Fight | Field Trip |  | 
          
                                                                                        | Sixth Crossing of the Sweetwater, Oregon Trail historic site | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Skiing, history of on Casper Mountain | Encyclopedia | Rebecca A. Hunt, Ph.D. | 
          
                                                                                        | Smith, Alfred E. | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Smith, Florence Blake, woman homesteader | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Smith, Nels | Encyclopedia | Wyoming State Archives | 
          
                                                                                        | Snodderly, Quintina, Oregon Trail Grave of | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Snow King ski area | Field Trip |  | 
          
                                                                                        | Snowy Range Scenic Byway | Field Trip |  | 
          
                                                                                        | Solier, C.H., Wyoming State Hospital superintendent | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Sommers Ranch | Encyclopedia | Stephanie Lowe | 
          
                                                                                        | South Pass | Encyclopedia |  | 
          
                                                                                        | South Pass and its monuments | Field Trip |  | 
          
                                                                                        | South Pass City | Field Trip |  | 
          
                                                                                        | South Pass City | Encyclopedia | WyomingHeritage.org, Wyoming State Historic Preservation Office | 
          
                                                                                        | South Pass Gold Rush | Encyclopedia |  | 
          
                                                                                        | South Pass Overlook | Field Trip |  | 
          
                                                                                        | South Pass, discovery | Encyclopedia |  | 
          
                                                                                        | South Pass, early missionaries | Encyclopedia |  | 
          
                                                                                        | South Pass, First Wagons | Encyclopedia |  | 
          
                                                                                        | Spanish Diggings | Field Trip |  | 
          
                                                                                        | Sparks, Kliss, Cokeville bombing survivor oral history | Oral Histories | Wyoming State Archives | 
          
                                                                                        | Spearfish Canyon | Field Trip |  | 
          
                                                                                        | Spence, Gerry | Encyclopedia | WyoHistory.org | 
          
                                                                                        | Spence, Gerry - interview | Oral Histories | Wyoming State Archives | 
          
                                                                                        | Spirit Mountain Cave | Field Trip |  | 
          
                                                                                        | Spirit Mountain Cave | Encyclopedia | Phil Roberts | 
          
                                                                                        | Split Rock | Encyclopedia | Wyoming State Historic Preservation Office | 
          
                                                                                        | Split Rock | Field Trip |  | 
          
                                                                                        | Spotted Tail, Brule Lakota chief | Encyclopedia | Tom Rea | 
          
                                                                                        | Spring Creek Raid | Encyclopedia | John W. Davis | 
          
                                                                                        | Spring Creek Raid Site | Field Trip |  | 
          
                                                                                        | Spring, Agnes Wright, Wyoming Federal Writers’ Project director | Encyclopedia | Kaylyn Mercuri Flowers | 
          
                                                                                        | Stagecoach and Mail Road, Rawlins to Fort Washakie | Encyclopedia | J. Tom Davis, Rebecca Hein | 
          
                                                                                        | Stagecoach Museum | Field Trip |  | 
          
                                                                                        | Stagecoach, Casper-Thermopolis line, 1901 | Encyclopedia | J. Tom Davis | 
          
                                                                                        | Stanton, Susan, violin | Oral Histories | Rebecca Hein | 
          
                                                                                        | Star Valley Pioneer and History Museum | Field Trip |  | 
          
                                                                                        | Starkweather, Charles | Encyclopedia | Lesley Wischmann | 
          
                                                                                        | State boundary monument for Utah, Idaho and Wyoming | Field Trip |  | 
          
                                                                                        | State Flag, Wyoming | Encyclopedia | Kylie Louise McCormick | 
          
                                                                                        | State Prison, Wyoming’s First | Encyclopedia | Lori Van Pelt | 
          
                                                                                        | Statehood: Constitutional Convention, Debates and Their Aftermath | Encyclopedia | Phil Roberts | 
          
                                                                                        | Steamboat Exhibit, University of Wyoming | Field Trip |  | 
          
                                                                                        | Stegner, Wallace and South Pass preservation | Encyclopedia |  | 
          
                                                                                        | Stepp, Alonzo, black rancher in the Green River Valley | Encyclopedia | WyoHistory.org, Jonita Sommers | 
          
                                                                                        | Stewardess training, Cheyenne | Encyclopedia | Michael Kassel, Starley Talbott | 
          
                                                                                        | Stewart, Elinore Pruitt, Writer and Homesteader | Encyclopedia | Barbara Allen Bogart | 
          
                                                                                        | Stimson, Joseph E., Wyoming photographer | Encyclopedia | Wyoming State Historic Preservation Office | 
          
                                                                                        | Stoner, Ethel, 1920s Cokeville mayor | Encyclopedia | Kylie Louise McCormick | 
          
                                                                                        | Stovall, John, bass | Oral Histories | Rebecca Hein | 
          
                                                                                        | Strausner, Adam LeRoy, oral history | Oral Histories | Dana Van Burgh | 
          
                                                                                        | Sublette County Public Library | Field Trip |  | 
          
                                                                                        | Sublette County, Wyoming | Encyclopedia | Ann Chambers Noble | 
          
                                                                                        | Suggs, Wyoming | Field Trip |  | 
          
                                                                                        | Sullivan, Mike | Encyclopedia | Wyoming State Archives | 
          
                                                                                        | Sullivan, Mike, U.S. ambassador to Ireland, oral history | Oral Histories | Tom Rea | 
          
                                                                                        | Swain, Louisa, first woman to vote under Wyoming Territory’s new woman suffrage law | Encyclopedia | Wyoming State Archives | 
          
                                                                                        | Swan Land and Cattle Company | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Swan, Alexander | Encyclopedia | Rebecca Hein | 
          
                                                                                        | Sweetwater County Historical Museum | Field Trip |  | 
          
                                                                                        | Sweetwater County, Wyoming | Encyclopedia | Dudley Gardner |