Cagayan National High School, abbreviated as CNHS and locally known as Cagayan High (Filipino: Pambansang Mataas na Paaralan ng Cagayan), is the universal high school of Region 2. It is located in Taft Street, Tuguegarao City, Cagayan,Philippines. Established in 1905, it is the oldest public secondary level school in Cagayan and the province's premier secondary school. Cagayan National High School was nationalized, from Cagayan High School, by virtue of Presidential Decree 1050 on July 1, 1976.