Valenzuela's 1st congressional district is one of the two congressional districts of the Philippines in the city of Valenzuela.

[3] The district was created following Valenzuela's conversion into a highly urbanised city through Republic Act No.

[4] 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 vacant for the 19th Congress since the resignation of its most recent representative, Rex Gatchalian, upon assuming the position of Secretary of Social Welfare and Development in 2023.

[5] Incumbent representative is Wes Gatchalian.