Caloocan City, is thefourth most populous cityin thePhilippines. It is one of the 16 cities that comprise the Philippines' National Capital Region of Metropolitan Manila.The city's name is colloquially spelled asKalookan. It comprises what is known as the CAMANAVA area along with citiesMalabon,Navotas, andValenzuela.
The wordcaloocancomes from theTagalogroot wordlo-ok;kalook-lookan(orkaloob-looban) means "innermost area".