Piñan, officially the Municipality of Piñan, is a fourth-class municipality in the province of Zamboanga del Norte, Philippines. According to the 2…Piñan, officially the Municipality of Piñan, is a fourth-class municipality in the province of Zamboanga del Norte, Philippines. According to the 2020 census, it has a population of 20,221 people. It is also known as New Piñan.