Nueva Ecija's 1st congressional district is one of the four congressional districts of the Philippines in the province of Nueva Ecija. It has been represented in the House of Representatives of the Philippines since 1928. The district consists of the western municipalities of Aliaga, Cuyapo, Guimba, Licab, Nampicuan, Quezon, Santo Domingo, Talavera and Zaragoza. It is currently represented in the 20th Congress by Mikaela Angela B. Suansing of the Partido Federal ng Pilipinas and Unang Sigaw.