Miagao, officially the Municipality of Miagao, is a 1st class municipality in the province of Iloilo, Philippines. According to the 2020 census, it has a population of 68,115 people.
Miagao is considered as the "Onion Capital of the Visayas". The town center of the municipality lies on the western bank of the Tumagbok River, the largest river in the municipality. The poblacion is made up of eight barangays.
The town holds their patronal fiesta in honor of St. Thomas of Villanova every September 22 that lasts several days. The town is also the location of one of the Baroque Churches of the Philippines, the Miagao Church, which was inscribed as a UNESCO World Heritage Site. The entire town of Miagao was later inscribed as a UNESCO World Heritage City and became a member of the Organization of World Heritage Cities.