Tuguegarao, officially the City of Tuguegarao,, simply referred to as Tuguegarao City and referred to by locals as Tugue, is a 3rd class city and capital of the province of Cagayan, Philippines. According to the 2015 census, it has a population of 153,502 people.. It is the regional and institutional center of Cagayan Valley (Region II), a major urban center in the Northeastern Luzon, a primary growth center and one of the fastest growing cities in the Philippines.