Allegany County is located in the northwestern part of the U.S. state of Maryland. As of the 2020 census, the population was 68,106. Its county seat is Cumberland. The name Allegany may come from a local Lenape word, welhik hane or oolikhanna, which means 'best flowing river of the hills' or 'beautiful stream'. Alleghany, or as some prefer to write it, Allegheny,—the Algonkin name of the Ohio River, but now restricted to one of its branches,—is probably (Delaware) welhik-hanné or [oo]lik-hanné, 'the best (or, the fairest) river.' Welhik (as Zeisberger wrote it) is the inanimate form of the adjectival, meaning 'best,' 'most beautiful.' In his Vocabulary, Zeisberger gave this synthesis, with slight change of orthography, as "Wulach'neü" [or [oo]lakhanne[oo], as Eliot would have written it,] with the free translation, "a fine River, without Falls." The name was indeed more likely to belong to rivers 'without falls' or other obstruction to the passage of canoes, but its literal meaning is, as its composition shows, "best rapid-stream," or "finest rapid-stream;" "La Belle Riviere" of the French, and the Oue-yo´ or O hee´ yo Gä-hun´-dä, "good river" or "the beautiful river," of the Senecas. For this translation of the name we have very respectable authority,—that of Christian Frederick Post, a Moravian of Pennsylvania, who lived seventeen years with the Muhhekan Indians and was twice married among them, and whose knowledge of the Indian languages enabled him to render important services to the colony, as a negotiator with the Delawares and Shawanese of the Ohio, in the French war. In his "Journal from Philadelphia to the Ohio" in 1758, after mention of the 'Alleghenny' river, he says: "The Ohio, as it is called by the Sennecas. Alleghenny is the name of the same river in the Delaware language. Both words signify the fine or fair river." La Metairie, the notary of La Salle's expedition, "calls the Ohio, the Olighinsipou, or Aleghin; evidently an Algonkin name,"—as Dr. Shea remarks. Heckewelder says that the Delawares "still call the Allegany (Ohio) river, Alligéwi Sipu,"—"the river of the Alligewi" as he chooses to translate it. In one form, we have wulik-hannésipu, 'best rapid-stream long-river;' in the other, wuliké-sipu, 'best long-river.' Heckewelder's derivation of the name, on the authority of a Delaware legend, from the mythic 'Alligewi' or 'Talligewi,'—"a race of Indians said to have once inhabited that country," who, after great battles fought in pre-historic times, were driven from it by the all-conquering Delawares,—is of no value, unless supported by other testimony. A number of counties and a river in the Appalachian region of the U.S. are named Allegany, Allegheny, or Alleghany. Allegany County is part of the Cumberland, MD-WV Metropolitan Statistical Area. It is a part of the Western Maryland "panhandle".
The western part of Maryland (including the present Allegany County) was originally part of Prince George's County when Maryland was formed in 1696. This county included six current counties, and by repeated splitting, new ones were generated: Frederick from Prince George's in 1748; and Montgomery and Washington from Frederick in 1776.
Allegany County was formed in 1789 by the splitting of Washington County. At the time it was the westernmost county in Maryland, but a split in 1872 produced Garrett County, the current westernmost county. Prior to 1789, the Virginia Commonwealth claimed the area of present-day Garrett and Allegany Counties, of Maryland. A 1771–1780 map of Virginias counties, shows Hampshire County, but the Virginia State boundary has Hampshire outside that boundary line. When conducting genealogical research, it is possible to find tax records for Hampshire County, Virginia included in Maryland records, and Maryland records in Hampshire County... Hampshire County was formed in 1758 by the Virginia Commonwealth and at its founding, included the present day counties of Garrett and Allegany Counties in Maryland, and Hardy, Grant, Mineral, and part of Morgan Counties in what is now West Virginia.
