1821 establishments in North America

Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, sharing a maritime border with Ecuador to the south of Cocos Island. It has a population of around five million in a land area of nearly 51,180 km2 (19,760 sq mi); the capital and largest city is San José, home to around 350,000 residents and two million people in the surrounding metropolitan area.

Honduras, officially the Republic of Honduras, is a country in Central America. It is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast by Nicaragua, to the south by the Pacific Ocean at the Gulf of Fonseca, and to the north by the Gulf of Honduras, a large inlet of the Caribbean Sea. Its capital and largest city is Tegucigalpa.

El Salvador, officially the Republic of El Salvador, is a country in Central America. It is bordered on the northeast by Honduras, on the northwest by Guatemala, and on the south by the Pacific Ocean. El Salvador's capital and largest city is San Salvador. El Salvador's population in 2024 was estimated to be 6 million.

Guatemala, officially the Republic of Guatemala, is a country in northern Central America. It is bordered to the north and west by Mexico, to the northeast (in the adjacency zone) by Belize, to the east by Honduras, and to the southeast by El Salvador. It is bounded by the Pacific Ocean to the south and the Gulf of Honduras to the northeast.

1821–1822 republic in the Caribbean Sea