Laoag, officially the City of Laoag, is a 3rd class component city and capital of the province of Ilocos Norte, Philippines. According to the 2020 census, it has a population of 111,651 people. It is the province's most populous, political, commercial, and industrial hub and the location of Ilocos Region's busiest commercial airport. It is also the northernmost city in the Philippines. The municipalities of San Nicolas, Paoay, Sarrat, Piddig, Vintar, and Bacarra form its boundaries.