Shariff Aguak was founded as
Maganoy in September 11, 1963, when President
Diosdado Macapagal signed Executive Order No. 47 stipulating the creation of the municipality within the old province of
Cotabato. It was created from the southern 28 barangays of
Datu Piang. The town's name was changed from
Maganoy to
Shariff Aguak by virtue of
Muslim Mindanao Autonomy Act No. 45 in 1996. On July 30, 2009, upon the ratification of Muslim Mindanao Autonomy Acts No. 225 (as amended by MMAA 252) and MMAA 220, the municipalities of
Shariff Saydona Mustapha and
Datu Hoffer Ampatuan, respectively, were created from a total of 13 barangays of the 26 Shariff Aguak, in addition to other barangays from
Datu Piang,
Datu Saudi Ampatuan,
Datu Unsay and
Mamasapano. Shariff Aguak (then Maganoy) was Maguindanao's provincial capital from its creation in 1973 to 1977. In 1977,
President Ferdinand Marcos moved the province's seat of government to the municipality of
Sultan Kudarat by virtue of Presidential Decree No. 1170. Batas Pambansa Blg. 211, enacted in 1982, aimed to formally restore the status of Maganoy as Maguindanao's seat of provincial government but the plebiscite scheduled for December 18, 1982 was never administered, thereby making the law not legally binding. However, the town has served as the
de facto capital during the tenure of previous governors who hails from the town. By law (
de jure), Sultan Kudarat was historically recognized as the capital of Maguindanao from 1977 until 2014 when the Sangguniang Panlalawigan of Maguindanao approved a resolution formally recognizing
Buluan as the new provincial capital. In 2019 incumbent Governor Bai Mariam Mangudadatu expressed plans to move the provincial capitol back to Shariff Aguak. Pending the completion of the new provincial capitol complex at Buluan, the executive branch of provincial government holds offices in that town's Rajah Buayan Silongan Peace Center. On the other hand, the legislative branch of provincial government, the Sangguniang Panlalawigan of Maguindanao, continues to hold sessions in the rehabilitated buildings of the old provincial capitol in Barangay Simuay Crossing in the town of Sultan Kudarat. The
Ampatuan-built
former provincial capitol complex in Shariff Aguak, initially planned to be converted for public school use, is set to become the new regional headquarters of ARMM's Bureau of Fire Protection but eventually became an infantry brigade of the Philippine Army. On January 25, 2026, there was an attempted assassination and ambush against the mayor of Shariff Aguak, Akmad B. Ampatuan. The armored vehicle he was riding in was attacked using an
RPG-2 (B-40) anti-tank weapon and an automatic rifle. He managed to survive although two of his bodyguards were injured, while the three attackers died on the spot. ==Geography==