Colombia, republic in South America, situated in the northwestern part of the continent, and bounded on the north by Panama and the Caribbean Sea, on the east by Venezuela and Brazil, on the south by Peru and Ecuador, and on the west by the Pacific Ocean. Colombia is the only country of South America with coasts on both the Caribbean Sea and the Pacific Ocean. The total land area of the country is 1,141,748 sq km (440,831 sq mi). The capital and largest city is Bogota