What is the official language of Cagayan Valley region?

The Cagayan Valley region in the Philippines does not have an official language. The region is home to various ethnic groups, each with their own language. Some of the major languages spoken in the region include Ilocano, Ibanag, Itawis, Gaddang, and Kalinga. English and Filipino, the national language of the Philippines, are also widely used in the region for communication and education.