Rizal, officially the Municipality of Rizal, is a 5th class municipality in the province of Cagayan, Philippines. According to the 2020 census, it h…Rizal, officially the Municipality of Rizal, is a 5th class municipality in the province of Cagayan, Philippines. According to the 2020 census, it has a population of 19,077 people. Rizal, being on the border of Cagayan and Apayao provinces, has a cool climate similar to Baguio's. It attracts excursionists and vacationists anytime, especially in summer.