Piang (1846–1933) popularly known as Datu Piang was a Maguindanao leader, often referred to as the Grand Old Man of Cotabato.
Datu Piang (sometimes referred to as Amai Mingka) was recognized as the undisputed Moro leader in Central Mindanao when the United States Army occupied and administered what was then referred to as "Moroland".