Madalum is a 4th class municipality in the province of Lanao del Sur. Located along the periphery of lake lanao (the major power soures in Mindanao). It is bounded in the north by the municipality of Munai in the province of Lanao del Norte on the south by lake Lanao and on the east by Bacolod Grande and on the southeast by the municipality of Madamba.

The rich and vast resources of the municipality streches over an area of 3,739 has Which is 96% of the total land area of the privince of Lanao del Sur. According to the 2000 census, it has a population of 18,405 people in 2,804 households.

Madalum is politically subdivided into 37 barangays.

The climate is classified as type E which is characterized by even distribution of rainfall throughout the year with 120 inches average annual rainfall. The wettest month having at least three times the rainfall of the driest month is in the month of May and November.

The municipality has a silt loam soil type.

Other important characteristics of this town is its rivers, lake and streams such as Buisan-Linuk river and other existing rivers which potential for irrigation development and other major projects.

The primary agricultural product produce in this town is rice. Other major product produce in the area includes: corn, coconut, vegetable, root crops, banana, plantation crop, fruit crops and many other.