Balasan is a fourth class municipality in the province of Iloilo, Philippines. According to the 2010 census, it has a population of 29,724 people. In 1950, the barrio of Zarragoza was transferred from the town of Batad.
Balasan is politically subdivided into 23 barangays.
- Mamhut Norte
- Mamhut Sur
- Poblacion Norte
- Poblacion Sur