Colombia ( /kəˈlʌmbiə/ kə-LUM-biə, or /kəˈlɒmbiə/ kə-LOM-biə), officially the Republic of Colombia (Spanish: República de Colombia [reˈpuβlika ðe koˈlombja]), is a unitary constitutional republic comprising thirty-two departments. The country is located in northwestern South America, bordered to the northwest by Panama; to the north by the Caribbean Sea; to the east by Venezuela and Brazil; to the south by Ecuador and Peru; and to the west by the Pacific Ocean. Colombia has maritime borders with Ecuador, Panama, Venezuela, Jamaica, Haiti, the Dominican Republic, Honduras, Nicaragua and Costa Rica. Colombia is the 26th largest country by area and the fourth largest in South America after Brazil, Argentina and Peru. With over 46 million people, Colombia is the 27th largest country in the world by population and has the second largest population of any Spanish-speaking country in the world, after Mexico. Colombia is a middle power, with the fourth largest economy in Latin America, and the third largest in South America. Colombia is famous for the production of coffee, flowers, emeralds, coal, and oil. All of these products make up the primary sector of economy.

Gran Colombia (Spanish pronunciation: [ˈɡɾaŋ koˈlombja], Great Colombia) is a name used today for the state that encompassed much of northern South America and part of southern Central America from 1819 to 1831. This short-lived republic included the territories of present-day Colombia, Venezuela, Ecuador, Panama, northern Peru and northwest Brazil. The first three were the successor states to Gran Colombia at its dissolution. Panama seceded from Colombia in 1903. Since Gran Colombia's territory corresponded more or less to the original jurisdiction of the former Viceroyalty of New Granada, it also claimed the Caribbean coast of Costa Rica and Nicaragua, the Mosquito Coast, and Guayana Esequiba in Guyana.

Its existence was marked by a struggle between those who supported a centralized government with a strong presidency and those who supported a decentralized, federal form of government. At the same time, another political division emerged between those who supported the Constitution of Cúcuta and two groups who sought to do away with the Constitution, either in favor of breaking up the nation into smaller republics or maintaining the union but creating an even stronger presidency. The faction that favored constitutional rule coalesced around Vice-President Francisco de Paula Santander, while those who supported the creation of a stronger presidency were led by President Simón Bolívar. The two men had been allies in the war against Spanish rule, but by 1825, their differences had become public and were an important part of the political instability from that year onward.