Ilocos Sur's 1st congressional district
Ilocos Sur's 1st congressional district is one of the two congressional districts of the Philippines in the province of Ilocos Sur. It has been represented in the House of Representatives of the Philippines since 1916 and earlier in the Philippine Assembly from 1907 to 1916. The district consists of the provincial capital city of Vigan and adjacent municipalities of Bantay, Cabugao, Caoayan, Magsingal, San Ildefonso, San Juan, San Vicente, Santa Catalina, Santo Domingo and Sinait. It is currently represented in the 18th Congress by Deogracias Victor B. Savellano of the Nacionalista Party (NP).