Vigan, officially the City of Vigan, is a 4th class component city and capital of the province of Ilocos Sur, Philippines. According to the 2020 census, it has a population of 53,935 people. Located on the western coast of the large island of Luzon, facing the West Philippine Sea, it is a UNESCO World Heritage Site and it is one of the few Spanish colonial towns left in the Philippines whose old structures have mostly remained intact.