Mapandan is a 3rd class municipality in the province of Pangasinan, Philippines. According to the 2015 census, it has a population of 37,059 people. Mapandan is a Hall of Famer for having the Pangasinan's cleanest, safest and greenest municipality (Category B). Mapandan was also awarded the Pangasinan's Healthiest Municipality for having the least number of malnourished children. Mapandan is known for its yearly Pandan Festival. ^ Census of Population. "Region I ".