The Municipality of Mabini used to be part of the Province of Zambales and was surrounded by mountains, forests, and valleys. It was originally called "Balincaguin" that was derived from the Zambal phrase "
Bali Lan Caguin" which means "abode of bats". This name referred to the nocturnal mammals (bats) that inhabited the caves found in the hills and
mountains between the municipality and Zambales in the west and Tarlac to the south-west. The place is believed to have been founded in 1610 by Spanish missionaries from the
Order of Augustinian Recollects. In 1800, Balincaquin became a town under Don Isidro Puzon who is believed to be the founder. Some of its population (770 families) were Ilocanos who moved to the municipality due to its agricultural potential. The site where these settlers situated near the mountains used to be called "Conventa." Good quality rice was then consistently produced and marketed to Manila and even to China. Other products such as corn, sugar cane, cotton and so forth were also demanded and consequently distributed widely in numerous markets. Apart from agriculture, the industry of saddle-making, knapsack-making, and hat-weaving existed. The residents also engaged in tending to livestock such as cattle, carabaos, horses, and goats. At the same time, a gradual increase in the number of bats compelled the residents to catch them. These mammals were suspected of flying through the nearby forests because of the catching that lasted until 1930. The municipality was merged with Alaminos, Bani, Anda, Dasol, Burgos, Bolinao and Infanta in 1904 and presently comprises the province's first district. In 1930, the town's name was changed to Mabini in honor of hero
Apolinario Mabini. ==Geography==