Updated October 11, 2026. Dates and figures come from Wikipedia's sourced history articles and U.S. government records. Where historians disagree, we say so.
Puerto Rico's history in one paragraph: Indigenous peoples lived here for thousands of years before the Taíno, who called the island Borikén. Columbus claimed it for Spain in 1493, and Spain ruled for four centuries, building San Juan's fortresses and a plantation economy that relied on enslaved Africans until abolition in 1873. The United States took the island in the Spanish–American War of 1898, made Puerto Ricans U.S. citizens in 1917 and approved a local constitution in 1952. Puerto Rico remains a U.S. territory, and its political status is still debated.
Timeline at a glance
| Year | Event |
|---|---|
| Before 1493 | Taíno society, led by caciques such as Agüeybaná; island called Borikén |
| 1493 | Columbus arrives on his second voyage (Nov 19, now Discovery Day) |
| 1508 | Juan Ponce de León founds Caparra, the first Spanish settlement |
| 1511 | Taíno revolt against Spanish rule |
| 1521 | Settlers move from Caparra to the islet of San Juan |
| 1539 | Work begins on El Morro |
| 1634–1783 | San Cristóbal built; city walls begun 1634 |
| 1868 | Grito de Lares uprising (Sept 23) |
| 1873 | Slavery abolished (March 22) |
| 1897 | Spain grants a Charter of Autonomy (Nov 25) |
| 1898 | U.S. troops land at Guánica (July 25); Treaty of Paris (Dec 10) |
| 1900 | Foraker Act sets up a civil government |
| 1917 | Jones Act: Puerto Ricans become U.S. citizens |
| 1918 | Earthquake and tsunami hit the west coast (Oct 11) |
| 1948 | Luis Muñoz Marín becomes the first elected governor (took office 1949) |
| 1950 | Operation Bootstrap industrialization begins |
| 1952 | Commonwealth constitution approved |
| 2016 | Congress passes PROMESA and its oversight board |
| 2017 | Hurricane María (Sept 20) |
| 2019 | Mass protests lead Governor Ricardo Rosselló to resign |
Before Columbus
People reached Puerto Rico thousands of years before Europeans, beginning with Archaic (Ortoiroid) groups, followed by Saladoid and later cultures. By the time Columbus arrived, an estimated 30,000 to 60,000 Taíno lived on the island in villages led by caciques. The chief cacique was Agüeybaná. They called the island Borikén, the source of the words Borinquen and Boricua. You can still see their ceremonial ball courts at Caguana (Utuado) and Tibes (Ponce); see our historical sites guide.
Spanish rule (1493–1898)
Columbus reached the island on November 19, 1493, and named it San Juan Bautista. Spanish settlement began in 1508, when Juan Ponce de León founded Caparra and became the first governor. In the 1520s the names flipped: the harbor town took the name San Juan, and the whole island came to be called Puerto Rico.
The Taíno were forced into labor under the encomienda system. In 1511 they rose up. According to the traditional account, they first tested whether the Spaniards were mortal by drowning a soldier, Diego Salcedo. The revolt was put down, and disease, war and forced labor devastated the Taíno population over the following decades.
San Juan became Spain's guard post at the gateway to the Caribbean. Work on El Morro began in 1539, followed by San Cristóbal and the city walls from 1634. The forts held off or survived attacks by the English (1598) and Dutch (1625). In the 1700s and 1800s the economy turned to sugar and coffee, worked in part by enslaved Africans.
In the 19th century, Puerto Ricans pushed for more rights. On September 23, 1868, hundreds rose up in the Grito de Lares, an independence revolt that Spain quickly put down. Slavery was abolished on March 22, 1873. In November 1897, Spain granted a Charter of Autonomy with a local government, but the change of sovereignty came months later.
The United States arrives (1898–1952)
During the Spanish–American War, U.S. troops landed at Guánica on July 25, 1898. Under the Treaty of Paris (signed December 10, 1898), Spain ceded Puerto Rico to the United States.
- 1900, Foraker Act: replaced military rule with a civil government appointed largely from Washington.
- 1917, Jones Act: made Puerto Ricans U.S. citizens. The date, March 2, is now American Citizenship Day.
- 1918: a magnitude 7.3 earthquake and tsunami struck the west coast on October 11.
- 1930s: the Depression hit the sugar economy hard, and nationalist politics grew. In 1937, police killed protesters during a march in Ponce, an event known as the Ponce massacre.
- 1948: Luis Muñoz Marín became the first democratically elected governor. He served from 1949 to 1965. Under a 1948 "gag law", displaying the Puerto Rican flag in public was a crime for several years.
The Commonwealth era (1952–today)
In 1952, voters approved a constitution, and Puerto Rico became the Estado Libre Asociado (Commonwealth). Operation Bootstrap, launched in 1950, brought factories and fast growth in the 1950s and 1960s. Many Puerto Ricans also moved to the mainland, building the diaspora in New York and elsewhere.
Decades later, debt and economic decline led to a crisis. In 2016, Congress passed PROMESA, which created a federal oversight board to restructure the island's debt. On September 20, 2017, Hurricane María hit the island directly, knocking out power, water and communications for months. In 2019, after leaked chat messages, massive protests led Governor Ricardo Rosselló to resign.
The status question, whether Puerto Rico should be a state, independent or stay a territory, is still open.
See the history for yourself
- Historical sites in Puerto Rico: forts, Taíno sites, haciendas and lighthouses
- Old San Juan things to do and El Morro
- The black flag door, a protest symbol from 2016
- Public holidays that mark many of these dates
- Is Puerto Rico part of the U.S.?
FAQ
When was Puerto Rico discovered? Columbus reached the island on November 19, 1493, on his second voyage. The Taíno and earlier peoples had lived there for centuries.
What was Puerto Rico called before? The Taíno called it Borikén. Columbus named it San Juan Bautista.
When did Puerto Rico become part of the United States? Spain ceded it under the Treaty of Paris, signed December 10, 1898, after U.S. troops landed in July.
When did Puerto Ricans become U.S. citizens? In 1917, under the Jones Act.
Who was Puerto Rico's first elected governor? Luis Muñoz Marín, elected in 1948.
Originally published on PuertoRico.com (2022-12-19); last updated 2026-10-11.