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Bunce Island

번스섬 요새

Bunce Island
Photo: Pierre Chrzanowski, CC0 · source

A small island in the Sierra Leone River whose ruined 18th-century British slave fort is one of the most important sites of the Atlantic slave trade.

See it on the 3D globe →

At a glance

Country
Sierra Leone
Location
near Freetown, Sierra Leone
Built
1670
Type
Fort

Quick answers

Where is Bunce Island?

Bunce Island is in near Freetown, Sierra Leone.

When was Bunce Island built?

Bunce Island was built in 1670.

Bunce Island is a small island in the Sierra Leone River in West Africa, about 32 kilometres upriver from the capital, Freetown. It is only about 500 metres long and 107 metres wide, but it holds the ruins of a castle built by the Royal African Company around 1670. The island sits where large ocean-going ships could go no farther up Africa's largest natural harbour, which made it a handy base for European traders.

For well over a century the castle was a major post of the Atlantic slave trade. Tens of thousands of Africans were shipped from here to North America and the Caribbean, and many African Americans today, especially the Gullah people of the Carolina and Georgia coast, have ancestors who passed through it. Today the island is a place of memory and a protected historic site.

Who ran the castle

English traders fortified the island around 1670. Two London firms ran it in the early years, the Royal African Company and a spin-off called the Gambia Adventurers. In 1728 a powerful Luso-African trader named José Lopez da Moura raided and destroyed it. After the island lay empty until the mid-1740s, the firm Grant, Oswald and Company took over in 1748 and made it highly profitable. French forces attacked it four times and pirates twice, and the traders rebuilt it each time.

Link to America

Many captives were sold to rice planters in South Carolina and Georgia, who prized farmers skilled in growing rice. Ships from London, Liverpool, Bristol and New England ports also stopped at Bunce Island for water and supplies. The island's owner, Richard Oswald, later helped negotiate the Treaty of Paris, which ended the American War of Independence.

Ruins and remembering

Britain banned the slave trade in 1807 and the Royal Navy based its patrol squadron at Freetown. Bunce Island was shut down as a slave trading post and then abandoned around 1840. Still standing are the remains of the headquarters house, watchtowers, a gun platform and the gunpowder store, plus old graves. It became Sierra Leone's first protected historic site in 1948, and in 2007 to 2008 a team at James Madison University made a 3D reconstruction of the castle as it looked in 1805.

Fun facts

  • Its ruined fort was a major British slave-trading post in the 1700s.
  • The island is only about 500 metres long and 107 metres wide.
  • Some cannons still lying on the island carry the royal mark of King George III.
  • In 1948 it became Sierra Leone's first officially protected historic site.
  • A 3D reconstruction of the castle as it looked in 1805 was made by researchers at James Madison University.

On the globe

The model shows the small island with its ruined fort. Look at the walls that are all that remains of the old castle.

Quiz time

Which is older: Bunce Island or Grand Mosque of Conakry?

Show the answer

Bunce Island. (1670 vs 1982) Grand Mosque of Conakry →

Play the globe quiz →

Nearby on the globe

Sources

Updated: 2026-10-14