Laguna's 4th congressional district is one of the seven congressional districts of the Philippines in the province of Laguna. It has been represented in the House of Representatives of the Philippines since 1987. The district consists of the capital municipality of Santa Cruz and the entire eastern Laguna municipalities of Cavinti, Famy, Kalayaan, Luisiana, Lumban, Mabitac, Magdalena, Majayjay, Paete, Pagsanjan, Pakil, Pangil, Pila, Santa Maria and Siniloan. It is currently represented in the 20th Congress by Benjamin Agarao Jr. of the Partido Federal ng Pilipinas.