Allegany County is a county 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'. A number of counties and a river in the Appalachian region of the U.S. are named Allegany, Allegheny, or Alleghany.