Agpay was then a sitio of Barrio Libtong until it was segregated in the early 1960’s as another barrio of Burgos due to is growing population; the segregation was spearheaded by community elders led by the late Florencio Flora, Sr., Felipe Mendoza, Rafael Rimando, Necomedis Estandian and Emilio Rosimo with the hope that development be introduced separately by the Government in their own barangay.  During the early time of Mayor Ocbus Abansi, a primary school was established in the barrio with a teacher and a building made of cogon and bamboo.

            Located in rolling hills, it is bounded on the East by Palali, Saban, Benguet, on th West by Ribsuan, Naguilian, La Union, on the South by Libtong and Imelda and on the North by Bilis and New Poblacion. It occupies an area of 305.1127 hectares with a population of 709 (in 2015). BaragayAgpay comprises five sitios scattered around the barangay, namely: Sitio Sto. Domingo, where according to the old folks, the late martyred priest Father Jose G. Burgos said a holy mass while seeking refuge from the wrath of the Spaniards; Sitio Lower Agpay, located near the foot of a mountain and formerly called Liqua; Sitio Binukkualan, located at the side of a mountain and named after an Iloko word “bukwal” meaning to “overturn the soil” ready for planting; Sitio Dapil and Sitio Sentro, being the center of the barangay.  It is guarded on the western side by the Ribsuan River and on the northern side by the Pangasaan and Sangbay Creeks; with Dapil, Bautek and Batan Creeks on the Southern side.  Like other barangays in Burgos, the climate is temperately hot.

        The residents are mostly Ilocanos who trace their roots from neighbouring towns like Naguilian and Aringay, La Union. Most of them are engaged in farming as their main source of income.  They produce palay, tiger grass, some root crops like cassava and camote, and some lowland and highland vegetables. Some are employed in professional jobs and other skilled works.  Others are also engaged in basket weaving and handicrafts making.

            With the previous and present barangay officials efforts, Agpay now has a 2.72 kilometer-concreted barangay road, four classroom-school building, multi-purpose pavement, and barangay plaza, barangay hall, Child Development Center and Barangay Health Station. 

 Barangay Agpay now house an agri – eco- park, mini-conference hall and swimming pool owned by the Burgos Municipal Local Government Unit. A visitor could enjoy the panoramic view of the barangay’s neighbouring places and the fresh scent of nature that overwhelms the air. It could be reached through a 4.7 concreted barangay road winding through hills from the National Highway at Barangay New Poblacion.