Municipality of Shariff Saydona Mustapha, Maguindanao

Shariff Saydona Mustapha is a municipality in the province of Maguindanao, Philippines. According to the 2007 census, it has a population of at least 20,463 people (not counting the population of barangays only partially included). It was created out of 4 barangays from the municipality of Shariff Aguak, 4 entire barangays and a portion of one barangay from Mamasapano, 2 barangays from Datu Unsay, one barangay from Datu Piang, and 3 entire barangays and a portion of one barangay from Datu Saudi-Ampatuan by virtue of Muslim Mindanao Autonomy Act No. 225 (as amended by MMAA Act No. 252), which was subsequently ratified in a plebiscite held on July 30, 2009.