Colombia is a country in north-western South America. Colombia is bordered to the east by Venezuela and Brazil; to the south by Ecuador and Peru; to the north by the Caribbean Sea; to the north west by Panama; and to the west by the Pacific Ocean. Colombia also shares maritime borders with Jamaica, Haiti, the Dominican Republic, Honduras, Nicaragua and Costa Rica. Colombia is the 26th largest nation in the world and the fourth largest in South America (after Brazil, Argentina, and Peru). It has the 29th largest population in the world and the second largest in South America, after Brazil. Colombia has the third largest Spanish-speaking population in the world after Mexico and Spain.

Colombia is a standing middle power with the fourth largest economy in South America. It is very ethnically diverse, and the interaction between descendants of the original native inhabitants, Spanish colonists, African slaves and twentieth-century immigrants from Europe and the Middle East has produced a rich cultural heritage. This has also been influenced by Colombia's varied geography. The majority of the urban centres are located in the highlands of the Andes mountains, but Colombian territory also encompasses Amazon rainforest, tropical grassland and both Caribbean and Pacific coastlines. Ecologically, Colombia is one of the world's 17 megadiverse countries.