Caloocan City , is the third most populous city in the Philippines. It is one of the 16 cities that comprise the Philippines' National Capital Region of Metropolitan Manila. It was formerly a part of the Province of Rizal of the Philippines' Southern Luzon Region. According to the , it has a population of . For so long, the city's name is colloquially spelled as Kalookan. The city comprises what is known as the CAMANAVA area along with cities Malabon, Navotas, and Valenzuela.