Lanao del Sur

Lanao del Sur is a 1st-class province in the Philippines. It is part of the Bangsamoro Autonomous Region in Muslim Mindanao located in Mindanao. It has a population of 1,195,518 as of the 2020 Census, and a land area of 15,055.51 square kilometers.

The province is composed of 1 cities and 39 municipalities. Its capital is Marawi City.

In the 2022 elections, the province had 685,643 registered voters.