Allegheny

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

A County

 * Allegheny County, Pennsylvania

A Township

 * Allegheny Township, Blair, Pennsylvania
 * Allegheny Township, Somerset, Pennsylvania
 * Allegheny Township, Venango, Pennsylvania
 * Allegheny Township, Westmoreland, Pennsylvania

A Populated Place

 * Allegheny, Allegheny, Pennsylvania, a city annexed by the city of Pittsburgh in 1907

A Mountain Range

 * Allegheny Mountains, a range in Pennsylvania, Maryland, West Virginia, and Virginia