Concepcion is a third class,  coastal municipality in the province of Iloilo, Philippines. According to the 2015 census, it has a population of 43,159 people. It was the capital of the Commandancia of Concepcion, a unit equivalent to a sub-province headed by a corregidor, before it was merged with the Province of Iloilo. ^ "Province: Iloilo". PSGC Interactive. Quezon City, Philippines: Philippine Statistics Authority. Retrieved 12 November 2016. ^ "Region VI ". Census of Population : Total Population by Province, City, Municipality and Barangay.