Keystone is an

unincorporated community An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

in Albany County,

Wyoming Wyoming ( ) is a landlocked U.S. state, state in the Mountain states, Mountain West subregion of the Western United States, Western United States. It borders Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho t ...

, United States. The population of Keystone was recorded as 374 in the 1930 census but declined to 169 by 1940. In 1950, Keystone had a population of 120. Keystone once featured a gold mine with a shaft 365 feet deep.

References

Unincorporated communities in Albany County, Wyoming Unincorporated communities in Wyoming {{wyoming-geo-stub