Abra de Ilog was formerly a small settlement founded by Spanish religious missionaries sometime in the early part of the 17th century. According to folk history, its former name was Abre de Ilog. The name was derived from the Spanish verb abrir (to open) and the Tagalog noun ilog (river). Later on, the name evolved into its present name: Abra de Ilog, a Chabacano-like terminology which can be loosely translated as bucana ng ilog, or "opening of the river." This can be attributed to the numerous rivers and creeks that traverses strategic areas of the municipality.
In 1902, during the American Occupation the town was officially organized. Abra de Ilog's first "municipal president" was Rosaleo Miciano. But with the passage of Republic Act No. 1280 on January 4, 1905, Abra de Ilog was made a barrio of the municipality of Mamburao.
In 1910, Abra de Ilog regained its status as a municipality. On June 13, 1950, the government approved Republic Act No. 505 dividing Mindoro into two new provinces: Oriental Mindoro and Occidental Mindoro. Abra de Ilog was included as part of Occidental Mindoro.
Geography
Fields of Abra de Ilog.
Abra de Ilog is classified as partially urban. It is 32 kilometers (20mi) from Mamburao.
Barangays
Abra de Ilog is politically subdivided into 10 barangays. Each barangay consists of puroks and some have sitios.
The newest barangay, Santa Maria was created in 2014 from Wawa.
The Abra de Ilog-Paluan Schools District Office governs all educational institutions within the municipality. It oversees the management and operations of all private and public, from primary to secondary schools.[20]
Primary and elementary schools
Abra de Ilog Central School
Almeda Adventist Elementary School
Aluyan Primary School
Armado Elementary School
Bagolayag Min. Elementary School
Balao Elementary School
Biga Memorial School
Cabacao Elementary School
Cabacao Elementary School (Balantoy Annex)
Camurong Elementary School
Hebron Minority School
Kadilawan Elementary School
Kulanguan Prrmary School
Lago Minority School
Lucutan Elementary School
Lumangbayan Elementary School (Abra)
Matabang Elementary School
Matabang-Urilan Minority School
Pambuhan Minority School
Pandanan Minority School
Rayusan Minority School
San Rafael High School
San Vicente Elementary School
Sto. Tomas Min. Elementary School
Tibag Elementary School
Treasures from the Lord Development Center
Udalo Elementary School
Wawa Elementary School
Secondary schools
Abra de Ilog National High School
Abra de Ilog National High School (Biga Extension)
Abra de Ilog National High School (Camurong Annex)
Cabacao National High School
Pambuhan Indigenous People Village High School
Higher educational institution
University of Perpetual Help Mindoro Mission School