Isabela's 4th congressional district

Isabela's 4th congressional district is one of the six congressional districts of the Philippines in the province of Isabela. It has been represented in the House of Representatives of the Philippines since 1987. The district consists of the independent component city of Santiago and the municipalities of Cordon, Dinapigue, Jones, and San Agustin. It is currently represented in the 19th Congress by Joseph S. Tan of the Partido Federal ng Pilipinas (PFP).