Odiongan, officially the Municipality of Odiongan (Asi: Banwa it Odiongan, Filipino: Bayan ng Odiongan), is a 2nd class municipality in the province of Romblon, Philippines. Additionally, it is set to be elevated from a 2nd class to a 1st class municipality in the year 2024. According to the 2020 census, it has a population of 49,284 people. It is composed of 25 barangays.