Aleosan is within the political boundary of Cotabato Province. It is approximately sixty-five (65) kilometers from the capital town of Amas which is barely two (2) hours ride from the seat of its municipal government.
It is bounded on the west by Midsayap; on the north by Libungan and on the east and south by Pikit. Geographically, it lies 124º 36′ 41″ northeast to 124º 30′ 51″ northwest longitude and 7º 17′ 08″ north to 7º 04′ 11″ south latitude.
It is accessible to land transportation from Cotabato City traversing the municipalities of Maguindanao to Kidapawan up to Davao City, as it is strategically located along the major transport route linking the provinces of Maguindanao, Cotabato and Davao del Sur.