In  1960, there were only three new municipalities established, which included the Municipality of Dumalinao. The Municipality of Dumalinao was created by R.A. no. 1539 on June 16, 1956. Dumalinao is one of the 8LGUs along illana Bay in the province of Zamboanga del Sur. The Municipality is fast moving in terms of local economic development and coastal resources management. It is strategically located at the intersection of the highway going to Zamboanga Sibugay province, Zamboanga City and the road going to Zamboanga Peninsula and Dumanquillas Bay areas.