Binidayan, officially the Municipality of Binidayan, is a municipality in the province of Lanao del Sur, Philippines. According to the 2020 census…Binidayan, officially the Municipality of Binidayan, is a municipality in the province of Lanao del Sur, Philippines. According to the 2020 census, it has a population of 25,965 people. The name "Binidayan" derives from the term Bindayan, which means "ready to cultivate".