Colombia is a country in South America.
Colombia ( k ) , is a sovereign state largely situated in the northwest of South America , with territories in Central America . Since the 1960s , the country has suffered from an asymmetric low-intensity armed conflict , which escalated in the 1990s but then decreased from 2005 onward . Ecologically , it is one of the world 's 17 megadiverse countries , and the most densely biodiverse of these per square kilometer .