Valenzuela's 1st congressional district is one of the two congressional districts of the Philippines in the city of Valenzuela. It has been represented in the House of Representatives of the Philippines since 2001. The district was created following Valenzuela's conversion into a highly urbanised city through Republic Act No. 8526 on February 14, 1998. It consists of 24 barangays in the northern part of the city, namely Arkong Bato, Balangkas, Bignay, Bisig, Canumay East, Canumay West, Coloong, Dalandanan, Isla, Lawang Bato, Lingunan, Mabolo, Malanday, Malinta, Palasan, Pariancillo Villa, Pasolo, Poblacion, Polo, Punturin, Rincon, Tagalag, Veinte Reales, and Wawang Pulo. It is currently represented in the 20th Congress by Kenneth Gatchalian of the Nationalist People's Coalition (NPC).
Incumbent representative is Wes Gatchalian.