| Safety, Wyoming coal mines | Phil Roberts |
| Sagebrush Philosophy magazine | Rebecca Hein |
| Sailors, Kenny | Ryan Thorburn |
| Sailors, Kenny oral history | Wyoming State Archives |
| Saleratus Lake, Oregon Trail site of | WyoHistory.org |
| Saleratus Lakes | |
| Salt Creek Museum | |
| Salt Creek Oil Field | |
| Salt Creek Oil Field | Tom Rea |
| Sarah Thomas grave | Randy Brown |
| Saratoga and Encampment Valley Railroad | Lori Van Pelt |
| Saratoga Museum | |
| Saratoga National Fish Hatchery | |
| Saratoga Sun | |
| Saratoga, Wyoming, history of | Lori Van Pelt |
| Saratoga-Platte Valley Chamber of Commerce | |
| Schneider, Adam, Featherweight Boxer | Washakie Museum and Cultural Center |
| Second Baptist Church, Rock Springs | Brigida R. (Brie) Blasi |
| Sellett, Mike, Jackson Hole News publisher | Kerry Drake |
| Seminoe Cutoff | Randy Brown |
| Seminoe Cutoff | |
| Seminoe Dam | |
| Seminoe Dam, History of | Annette Hein |
| Seminoe State Park | |
| Sheep Business in Wyoming | Samuel Western |
| Sheep Creek Cemetery | |
| Sheepeaters | Rebecca Hein |
| Shepard, Matthew, Legacy of | Jason Marsden |
| Shepard, Matthew, Murder of | Jason Marsden |
| Shepperson, Frank, oral history | Mark Junge |
| Sheridan County Coal Camps | Kevin Knapp |
| Sheridan County Museum | |
| Sheridan County, Wyoming | Brodie Farquhar |
| Sheridan Inn | |
| Sheridan, Wyoming | Gregory Nickerson |
| Shoshone Cavern National Monument | Phil Roberts |
