Mapandan, officially the Municipality of Mapandan, is a municipality in the province of Pangasinan, Philippines. According to the 2020 census, i…Mapandan, officially the Municipality of Mapandan, is a municipality in the province of Pangasinan, Philippines. According to the 2020 census, it has a population of 38,058 people. Mapandan is known for its yearly Pandan Festival.