The Laoag Cathedral or St. William the Hermit Cathedral Parish is a church located in Laoag City, Ilocos Norte. It is the seat of the Roman Catholic Diocese of Laoag.
The church was built between 1650 and 1700. It was damaged by a fire in 1843, but was repaired under the supervision of Fr. Santiago Muniz and Antonio de la Camara.
When the Diocese of Laoag was created in 1961, the church was designated as its cathedral.
The church is of the Italian Renaissance design. It has a unique two-storey façade held by four pairs of coupled columns. The deeply recessed niche shows the image of San Guillermo.
The sinking bell tower is located 85 m away from the church. The 45-meter high bell tower is one of the edifices built in the province.
Laoag City is located 488 km from Manila, 363 km from Tarlac, 374 km from Baguio City, and 78 km from Vigan City.
- Layug, Benjamin L. A Tourist Guide to Notable Philippine Churches. Quezon City: New Day Publishers, 2007.