Dunbar Township is a township in Fayette County, Pennsylvania, United States. The population was 6,664 at the 2020 census, down from 7,126 at the 2010 census. Dunbar Township includes the unincorporated communities of Dickerson Run, Liberty, Adelaide, Crossland, Juniata, Little Summit, Graham Crossing, Leisenring, Rogerstown, Trotter, Greenwood Heights, Wheeler, Fayette, Sitka, Bowest, Monarch, Mahoning, Hill Farm, Ferguson, Pechin, Brown Row, Hardy Hill, Factory Hill, Furnace Hill, and Irishtown.