Cagayan de Oro, often abbreviated CDO or CdeO and sometimes just called "Cagayan", is known as the "City of Golden Friendship." It is the capital of the Province of Misamis Oriental and the "Gateway of Northern Mindanao."
The city is on the northern coastline of Mindanao in the southern part of the Philippines, with Macajalar Bay to the north, the municipality of Tagoloan to the east, Lanao del Norte to the south, and the municipality of Opol to the west. The Cagayan River splits the city into two, the Poblacion (downtown area) being on the eastern side of the river. CDO serves as the regional center of Northern Mindanao (Region X), and is the region's most populous highly-urbanized city. According to the 2015 Census, the city has a population of 675,950.