Puerto Rico (Spanish for 'rich port'; abbreviated PR; Taino: Boriken, Borinquen), officially the Commonwealth of Puerto Rico (Spanish: Estado Libre Asociado de Puerto Rico, lit.'Free Associated State of Puerto Rico'), is a Caribbean island and unincorporated territory of the United States. It is located in the northeast Caribbean Sea, approximately 1,000 miles (1,600 km) southeast of Miami, Florida, between the Dominican Republic and the U.S. Virgin Islands, and includes the eponymous main island and several smaller islands, such as Mona, Culebra, and Vieques. It has roughly 3.2 million residents, and its capital and most populous city is San Juan. Spanish and English are the official languages of the executive branch of government, though Spanish predominates.Puerto Rico was settled by a succession of indigenous peoples beginning 2,000 to 4,000 years ago; these included the Ortoiroid, Saladoid, and Tano. It was then colonized by Spain following the arrival of Christopher Columbus in 1493. Puerto Rico was contested by other European powers, but remained a Spanish possession for the next four centuries. An influx of African slaves and settlers primarily from the Canary Islands and Andalusia vastly changed the cultural and demographic landscape of the island. Within the Spanish Empire, Puerto Rico played a secondary but strategic role compared to wealthier colonies like Peru and New Spain. By the late 19th century, a distinct Puerto Rican identity began to emerge, centered around a fusion of indigenous, African, and European elements. In 1898, following the SpanishAmerican War, Puerto Rico was acquired by the United States.Puerto Ricans have been U.S. citizens since 1917, and can move freely between the island and the mainland. However, as residents of an unincorporated territory, American citizens of Puerto Rico are disenfranchised at the national level, do not vote for the president or vice president, and generally do not pay federal income tax. In common with four other territories, Puerto Rico sends a nonvoting representative to the U.S. Congress, called a Resident Commissioner, and participates in presidential primaries; as it is not a state, Puerto Rico does not have a vote in Congress, which governs it under the Puerto Rico Federal Relations Act of 1950. Congress approved a local constitution in 1952, allowing U.S. citizens residing on the island to elect a governor. Puerto Rico's current and future political status has consistently been a matter of significant debate.Beginning in the mid-20th century, the U.S. government, together with the Puerto Rico Industrial Development Company, launched a series of economic projects to develop Puerto Rico into an industrial high-income economy. It is classified by the International Monetary Fund as a developed jurisdiction with an advanced, high-income economy; it ranks 40th on the Human Development Index. The major sectors of Puerto Rico's economy are manufacturing (primarily pharmaceuticals, petrochemicals, and electronics) followed by services (namely tourism and hospitality).

Christopher Columbus (; born between 25 August and 31 October 1451, died 20 May 1506) was an Italian explorer and navigator who completed four voyages across the Atlantic Ocean, opening the way for the widespread European exploration and colonization of the Americas. His expeditions, sponsored by the Catholic Monarchs of Spain, were the first European contact with the Caribbean, Central America, and South America.

The name Christopher Columbus is the Anglicisation of the Latin Christophorus Columbus. Scholars generally agree that Columbus was born in the Republic of Genoa and spoke a dialect of Ligurian as his first language. He went to sea at a young age and travelled widely, as far north as the British Isles and as far south as what is now Ghana. He married Portuguese noblewoman Filipa Moniz Perestrelo and was based in Lisbon for several years, but later took a Castilian mistress, Beatriz Enríquez de Arana; he had one son with each woman.

Largely self-educated, Columbus was widely read in geography, astronomy, and history. He developed a plan to seek a western sea passage to the East Indies, hoping to profit from the lucrative spice trade. Following Columbus's persistent lobbying in multiple kingdoms, the Catholic Monarchs Queen Isabella I and King Ferdinand II agreed to sponsor a journey west. Columbus left Castile in August 1492 with three ships and made landfall in the Americas on 12 October, ending the period of human habitation in the Americas now referred to as the pre-Columbian era. His landing place was an island in the Bahamas, known by its native inhabitants as Guanahani. He subsequently visited the islands now known as Cuba and Hispaniola, establishing a colony in what is now Haiti. Columbus returned to Castile in early 1493, bringing a number of captured natives with him. Word of his voyage soon spread throughout Europe.

Columbus made three further voyages to the Americas, exploring the Lesser Antilles in 1493, Trinidad and the northern coast of South America in 1498, and the eastern coast of Central America in 1502. Many of the names he gave to geographical features, particularly islands, are still in use. He also gave the name indios ("Indians") to the indigenous peoples he encountered. The extent to which he was aware that the Americas were a wholly separate landmass is uncertain; he never clearly renounced his belief that he had reached the Far East. As a colonial governor, Columbus was accused by his contemporaries of significant brutality and was soon removed from the post. Columbus's strained relationship with the Crown of Castile and its appointed colonial administrators in America led to his arrest and removal from Hispaniola in 1500, and later to protracted litigation over the perquisites that he and his heirs claimed were owed to them by the crown.

Columbus's expeditions inaugurated a period of exploration, conquest, and colonization that lasted for centuries, helping create the modern Western world. The transfers between the Old World and New World that followed his first voyage are known as the Columbian exchange. Columbus was widely celebrated in the centuries after his death, but public perception has fractured in the 21st century as scholars have given greater attention to the harms committed under his governance, particularly the beginning of the depopulation of Hispaniola's indigenous Taínos caused by mistreatment and Old World diseases, as well as by that people's enslavement. Proponents of the Black Legend theory of historiography claim that Columbus has been unfairly maligned as part of a wider anti-Catholic sentiment. Many places in the Western Hemisphere bear his name, including the country of Colombia, the District of Columbia, and British Columbia.