Lanao del Sur's 1st congressional district is a congressional district in the province of Lanao del Sur that has been represented in the House of Representatives of the Philippines since 1987.

[3] It covers the eastern interior municipalities bordering the provinces of Bukidnon and Cotabato as well as those along the northern shores of Lake Lanao including its capital city, Marawi.

[4] The district is currently represented in the 19th Congress by Ziaur-Rahman A. Adiong of Lakas-CMD.

[5]