Sallapadan is part of the municipalities that comprises Abra. A fifth class municipality with over 6,000 people and governmentally subdivided into 9 barangays.
Under the American regime in the highlands of Abra, Sal-lapadan was the first Tinguian settlement established. The municipality derived its name from the barrio where the seat of government originally was. From the name of a wild bush, "Sahipa-chan" which was widespread at the time in the area, thus, the original inhabitants named their settlement "Sahipa-chan."