Mount Vernon is an

unincorporated community An unincorporated area is a region that is not governed by a local municipal corporation. Widespread unincorporated communities and areas are a distinguishing feature of the United States and Canada. Most other countries of the world either have ...

located within Elizabeth Township,

Allegheny County Allegheny County () is a County (United States), county in the Commonwealth (U.S. state), Commonwealth of Pennsylvania. It is located in Southwestern Pennsylvania. As of the 2020 census, the population was 1,250,578, making it the state's seco ...

Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...

, United States.

References

Unincorporated communities in Allegheny County, Pennsylvania Unincorporated communities in Pennsylvania {{AlleghenyCountyPA-geo-stub