Like the other barangays of Sablan, Barangay Pappa was created under the Philippine Commission Act 4203, section 7 on May 17, 1927. According to history Pappa was the old seat of government of Sablan.
Pappa is located on the north-western portion of the municipality. It is 2.00 and 3.20 kilometers away from the Quirino National Highway and Poblacion, respectively. Following the national road, the barangay is 21 kilometers away from Baguio City and 27 kilometers away from the Provincial Capitol of Benguet. It is bounded on the north by the Municipality of Burgos, La Union and the Municipality of Kapangan, south by Barangay Poblacion, east by Barangay Kamog and Barangay Bagong, and west by the Province of La Union.
The Barangay is comprised of eight (8) major sitios namely; Dalayap, Balingew, Bayayeng, Timoy, Bangao, Taya, Apdot and Bosew.
The people in the barangay are generally composed of Ibaloi. Other ethnic groups like Ifugao and Kankanaey arrived in the area through intermarriages.
The major source of income in the barangay is farming.