Allegheny

Allegheny (see also the variants Allegany and Alleghany) may refer to:

A County

 * Allegheny County, Pennsylvania

A Populated Place

 * , unincorporated community in Sierra County
 * , a city annexed by the city of Pittsburgh in 1907
 * , a city annexed by the city of Pittsburgh in 1907

A Mountain Range

 * , part of the Appalachian Mountain Range in West Virginia, Pennsylvania, Maryland and Virginia