This article lists the oldest extant buildings in Wyoming, including extant buildings and structures constructed prior to and during the United States rule over Wyoming. Only buildings built prior to 1880 are suitable for inclusion on this list, or the building must be the oldest of its type.
In order to qualify for the list, a structure must:
This consciously excludes ruins of limited height, roads and statues. Bridges may be included if they otherwise fulfill the above criteria. Dates for many of the oldest structures have been arrived at by radiocarbon dating or dendrochronology and should be considered approximate. If the exact year of initial construction is estimated, it will be shown as a range of dates.
| Building | Image | Location | First built | Use | Notes |
|---|---|---|---|---|---|
| Old Bedlam at Fort Laramie National Historic Site | Torrington, Wyoming | 1849 | Fort | Oldest building built in Wyoming[1] | |
| Fort Bridger | Fort Bridger, Wyoming | 1858 | Fort | Several 1858 buildings survive, including the sentry box and ruins of the commissary building and the old guardhouse.[2] | |
| Blacksmith shop at Fort Halleck (Wyoming) | Fort Halleck (Wyoming) | 1860s | Fort | ||
| Fort Fred Steele State Historic Site | Fort Fred Steele State Historic Site | 1860s | Fort | ||
| Fort Sanders (Wyoming) | Albany County, Wyoming | 1869 | Fort | ||
| Wyoming Territorial Penitentiary | Laramie, Wyoming | 1872 | Penitentiary | ||
| Jim Baker Cabin | Savery, Wyoming | 1873 | |||
| Bath Ranch | Laramie, Wyoming | 1875 | Residence | ||
| Durlacher House | Laramie, Wyoming | 1875-1878 | Residence | Queen Anne style house built by German immigrants.[3] | |
| Old Main (University of Wyoming) | Laramie, Wyoming | 1886 | University | Oldest University of Wyoming building | |
| Rock Church (Auburn, Wyoming) | Auburn, Wyoming | 1889 | Church | One of oldest churches and buildings in Star Valley.[4] | |