Central America (Spanish: Centroamérica or América Central) is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. Most of Central America is considered to be part of the Mesoamerican biodiversity hotspot.
Central America has an area of 524,000 square kilometers (202,000 sq mi), or almost 0.1% of the Earth's surface. As of 2009, its population was estimated at 41,739,000. It has a density of 79 people per square kilometer or 206 people per square mile.
Physiographically, Central America is the tapering isthmus of southern North America, extending from the Isthmus of Tehuantepec in southern Mexico southeastward to the Isthmus of Panama where it connects to the Colombian Pacific Lowlands in northwestern South America. Alternatively, the Trans-Mexican Volcanic Belt delimits the region on the north. Central America has an area of some 592,000 square kilometres. The Pacific Ocean lies to the southwest, the Caribbean Sea lies to the northeast, and the Gulf of Mexico lies to the north. Most of Central America rests atop the Caribbean Plate.
Volcanic eruptions are common in the region. In 1968 the Arenal Volcano, in Costa Rica, erupted and killed 87 people. Fertile soils from weathered volcanic lavas have made it possible to sustain dense populations in the agriculturally productive highland areas.
Geopolitically, Central America has traditionally consisted of the following countries:
Many modern definitions of Central America include Belize, and Panama, which did not exist upon the formation of the Federal Republic of Central America, a short-lived union created after most of the region gained independence from Spain in 1821. The territory now occupied by Belize was originally contested by the United Kingdom and the Spanish Empire and, later, Guatemala (which has considered it, wholly or partially, an eastern department); it became a British colony (British Honduras) in 1871 and gained independence in 1981.
In pre-Columbian times, the north-western areas of modern Central America were part of the Mesoamerican civilization. The Native American societies of Mesoamerica occupied the land ranging from central Mexico in the north to Costa Rica in the south. Most notable among these were the Maya, who had built numerous cities throughout the region, and the Aztecs, who created a vast empire. The pre-Columbian cultures of Panama traded with both Mesoamerica and South America, and can be considered transitional between those two cultural areas.
Following Christopher Columbus's discovery of the Americas for Spain, the Spanish sent numerous expeditions to the region, and they began their conquest of Maya lands in the 1520s. In 1540, Spain established the Captaincy General of Guatemala, which extended from southern Mexico to Costa Rica, and thus encompassed most of what is currently known as Central America, with the exception of British Honduras (present-day Belize). This lasted nearly three centuries, until a rebellion (which followed closely on the heels of the Mexican War of Independence) in 1821.