Tuguegarao, officially the City of Tuguegarao, is a 1st class component city and capital of the province of Cagayan, Philippines. According to …Tuguegarao, officially the City of Tuguegarao, is a 1st class component city and capital of the province of Cagayan, Philippines. According to the 2020 census, it has a population of 166,334 people, making it the most populous city in Cagayan Province, Cagayan Valley and Northeastern Luzon.