Allegheny, Alleghany or Allegany may refer to:

Look up Allegheny or Alleghany in Wiktionary, the free dictionary.

• Allegheny (train), a passenger train operated by the Pennsylvania Railroad
• Allegheny Railroad, a railroad operating in northwestern Pennsylvania (1985–92)
• Allegheny station (disambiguation), stations of the name
• Allegheny Valley Railroad, a railroad operating in Western Pennsylvania since 1992
• Allegheny Valley Street Railway, an electric rail line operating along the Allegheny River (1906–37)
• Allegheny class, a class of 2-6-6-6 locomotives

• Alleghany Corp., an insurance holding company
• Allegheny Airlines, a forerunner of US Airways
• Allegheny College, in Meadville, Pennsylvania
• Allegheny Energy, a public utility (including its subsidiary Allegheny Power)
• Allegheny Foundation, a charitable organization focused on Western Pennsylvania
• Allegheny Mountain Radio, a network of radio stations in West Virginia and Virginia
• Allegheny Technologies, a specialty metals company
• Allegheny (titular see), a Roman Catholic titular see
• Pittsburgh Allegheny (International Association), a nineteenth century minor league baseball team that, at times, played under the name "Allegheny"

• Pachysandra procumbens or Allegheny pachysandra, a plant in the box family
• Allegheny woodrat, a species of pack rat in the eastern US
• Allegheny Mountain dusky salamander, a species of the eastern US and Canada
• Allegheny mound ant, a species of the eastern US and Canada
• "Allegheny alligator", nickname for the hellbender
• Allegheny chinquapin (Castanea pumila), a species of chestnut

• All pages with titles beginning with Allegheny
• All pages with titles beginning with Alleghany
• Allegany (disambiguation)

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