It is said that when some Spaniards wanted to know the name of the trees, they asked a native saying, "Como se llama el grande lenia?

Tumauini was officially established as a Spanish mission in 1704, with civil administration frequently shifting between the neighboring towns of Cabagan and Ilagan.

Poverty Incidence of Tumauini Source: Philippine Statistics Authority[14][15][16][17][18][19][20][21] Over the past years, the town's economy had dramatically shifted from stagnant to a fast-moving basis.

[22][23] In 2015, the retail giant SM Prime established its first Savemore Market branch along the National Highway in the town.

Two years later, in 2017, the well-known multinational fast-food chain Jollibee opened its first branch in the area, providing residents with a wider variety of dining options.

The multi-million modern market complex is composed of eight buildings located along National Highway and serves as the major trading hub of the town and nearby municipalities.

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

The newly built multi-million peso structure is designed to accommodate government functions, delivery of basic services for the people and as a facility for various civic and cultural activities.

These newly built modern facilities were erected to accommodate legislative functions for the members and staffs of the municipal council and give a bigger office space for the Philippine National Police to help them perform their duties and responsibilities in maintaining the peace and order within the town’s territorial boundaries.

The newly built astrodome is the largest of its kind in Cagayan Valley Region with an area of 4,140 square meters with 14 layers of concrete bleachers located beside the municipal hall along Maharlika Highway in barangay San Pedro.

[43] The St. Matthias Medical Center of Isabela, Inc. is a privately-owned Level-II hospital located along Maharlika Highway in barangay Lalauanan.

[50] The building of the church from light materials by Francisco Nunez O. P. began in 1707 after Tumauini was separated from Cabagan and became a regular parish in 1751.

They were made of bricks and coral stones with a cylindrical bell tower, the only of its kind in the Philippines which was constructed by Fr.

The Church was partly damaged during World War II but was repaired to its original form by the parishioners of Tumauini.

The same would be done for other churches listed in UNESCO's tentative sites, where each town plaza and surrounding heritage buildings would be added.

It is located at the eastern outskirts of the Spanish – built town of Tumauini, on a 23.5 hectares (58 acres) of the elevated mass of rolling hills 500 feet above sea level.

Its name was derived from the first syllable of the surnames of the spouses, Ricardo C. Sadornas and Purificacion Malana who donated the camp to the Boy Scouts of the Philippines in 1954.

The patronal town fiesta is in honor of St. Mathias and the promotion of Tumauini as a source of corn and its by-products.

The locals have named two large rocks in the center of the river "Kambal na Bato" (twin stones), which are also a tourist attraction because of their unique and unusual appearance.