The act was approved on April 8, 1952,[1] with the former barrio of Olango as the seat of government.

It took the settlers gradual adaptation and acclimatization before they finally convinced their relatives and other migrants to settle permanently.

Mallig has significant rainfall most months, with a short dry season.

Its principal crops is mainly rice but corn and tobacco are produced in quantity.

Other major crops are mango, calamansi (calamondin orange), banana, peanut, and vegetables.

[24] As a municipality in the Province of Isabela, government officials in the provincial level are voted by the electorates of the town.

Mallig, belonging to the fifth legislative district of the province of Isabela, currently represented by Hon.

[26] The Schools Division of Isabela governs the town's public education system.