The Ateneo de Tuguegarao, also referred to by its acronym AdT was a private Catholic college ran by the Philippine Province of the Society of Jesus in Tuguegarao City, Cagayan, Philippines. It was established in 1945 when the Jesuits took over the administration of the diocesan secondary school, Cagayan Valley Atheneum. The Jesuits renamed the school Ateneo de Tuguegarao after taking control. The Jesuits were naming all the schools that they were opening at that time Ateneo. Ateneo de Tuguegarao was the fifth school in the Philippines that the Jesuits named Ateneo. Ateneo de Tuguegarao had a high school and college departments. In 1962, the school was closed when the Jesuits left Tuguegarao.