Agamata dating site
The natives abandoned their settlement after burning their church and houses until 1622 when the Spanish government pardoned and exempted them from paying tribute within three years.After the Gaddang revolt, the natives re-established their settlement upon the efforts of Fr.
It is one of the populous settlement during that period and site of the vast tobacco plantation in the region making it one of the most important economic areas in northern Luzon.
Rafael Maramag, a former municipal president (mayor) of Ilagan was appointed as the first governor.
The act then re-established Ilagan as the provincial capital.
Statistics from the Philippine Statistics Authority show that Ilagan had a population 131,24311 in 2007, which increased to 135,174 people in the 2010 census making Ilagan as the most populous city in the province of Isabela and the second in Cagayan Valley after Tuguegarao.
Ilagan's population is predominantly Roman Catholic. The Diocese of Ilagan has 39 catholic churches all over the province of Isabela.Pedro Jimenez in 1678 on the east side of the river thereby giving the legendary name for Ilagan which is the reverse of the word Nagali meaning "transfer".