Region I â Ilocos Region Northwest Coast of Luzon Provinces - coastal Capitals Laoag City (regional center) â Ilocos Norte Vigan City (regional center) â Ilocos Sur San…
Region I â Ilocos Region Northwest Coast of Luzon Provinces - coastal Capitals Laoag City (regional center) â Ilocos Norte Vigan City (regional center) â Ilocos Sur San…