San Guillermo, Isabela, Cagayan Valley Region, Philippines

🇵🇭 San Guillermo, officially the Municipality of San Guillermo, is a 4th class municipality in the province of Isabela, Philippines.

Etymology The town was named after Eugenio Guillermo, former mayor of Angadanan.

History On June 17, 1967, the municipality of San Guillermo was created by virtue of Republic Act No. 4906, sponsored by Melanio Singson, the then-representative of Isabela's lone district. It took 15 barangays from Angadanan (i.e. Anonang, Colorado, Calaoagan, Dipacamo, Peredo Edcor, Guam, Nakar, Palawan, Progreso, San Francisco Norte, San Mariano Norte, San Mariano Sur, Villa Rose, Villa Sanchez, and Villa Teresita) and 4 from Echague (i.e. Aringay, Dingading, San Francisco Sur and Sinalugan).

Due to a noticeable increase in the rate of population migration and potential economic growth, additional barangays were created during the term of Mayor Alvaro Filart, such as barangays Burgos, Dietban, Estrella, Rizal, San Rafael and Villa Remedios. Subsequently, barangay Peredo Edcor was split into two barangays, namely: Centro 1 and Centro 2, which is now the poblacion and the municipality's official seat.

Geography: Barangays San Guillermo is politically subdivided into 26 barangays.  Each barangay consists of puroks while some have sitios. • Anonang • Aringay • Burgos • Calaoagan • Centro 1 (Poblacion) • Centro 2 (Poblacion) • Colorado • Dietban • Dingading • Dipacamo • Estrella • Guam • Nakar • Palawan • Progreso • Rizal • San Francisco Norte • San Francisco Sur • San Mariano Norte • San Mariano Sur • San Rafael • Sinalugan • Villa Remedios • Villa Rose • Villa Sanchez • Villa Teresita.

Demographics In the 2020 census, the population of San Guillermo, Isabela, was 20,915 people, with a density of 64 inhabitants per square kilometre or 170 inhabitants per square mile.

Education The Schools Division of Isabela governs the town's public education system. The division office is a field office of the DepEd in Cagayan Valley region. The office governs the public and private elementary and public and private high schools throughout the municipality.