Ambaguio

', officially the ' (; ), is a in the province of , . According to the , it has a population of people.
Etymology.
The name "ambaguio" was from the word "bagiw," meaning "moss" which covered every inch of trees and stones in the area. The inhabitants were called "e-am-bagiw" meaning "conqueror of moss." 
The name underwent a series of changes due to its difficult pronunciation by the lowland people who later settled in the area, resulting in the present "Ambaguio."
History.
A handful of settlers headed by Fausto Tagangtang who came from the neighboring Mountain Province pioneered and disturbed the tranquility of the place transforming the wilderness into growing prosperous farm hills and rice terraces.
Due to its terrain, distance and road problems, the inhabitants composed only of three major tribes: Igorot, Ifugao, and Ibaloi, who came to the place for refuge for a better living, shelter and justice and were united under the leadership of Fausto Tagangtang. The inhabitants, by way of a unanimous decision, called the place “Ambaguio”, which means “the land of mosses”, and “its climate is similar to that of Baguio”.
Before its creation as a municipality, Ambaguio was then a barrio of the Municipality of Bayombong. Leonardo B. Perez, then Congressman of Nueva Vizcaya, authored the bill seeking for the creation of Ambaguio as an independent municipality. The bill was approved on 18 June 1966 by virtue of Republic Act. No. 4735. In the same year, Mr. Mariano L. Agnahe, the then Incumbent Barrio Lieutenant, was appointed as the first mayor of the town.
Barangays.
Ambaguio is politically subdivided into 8 barangays.