[3] In 1956, the barrios of Dumalinao Proper, Bigong, Ticwas, Bulongating, Baguitan, Pantad, Napulan, Tagulo, Camanga, Margang, Sibucao, Tina, Guling, Miculong, Baga, Rebucon, Mama and Bibilik were separated from Pagadian and constituted into Dumalinao through House Bill No.

[5] The person responsible for sponsoring the bill was Congressman Alberto Q. Ubay of Zamboanga del Norte since during that time, Zamboanga del Sur had no congressman; Rep. Roseller T. Lim that time had been elected to the Senate in the 1955 special election.

The new town then had four councilors: Vicente T. Labrado, Severino Ramas, Fulgencio Lauglaug, and Eniiego Gemina, although the latter did not serve.

Poverty Incidence of Dumalinao Source: Philippine Statistics Authority[12][13][14][15][16][17][18][19] Agriculture is the main economic activity as well as the number one source of livelihood of the people, although Dumalinao is a coastal town.

The town is one of the major rice granaries of Zamboanga del Sur as 5,998 hectares of the land area is devoted to agricultural production.