The Merikins or Merikens were African-American Marines of the War of 1812 – former African slaves who fought for the British against the US in the Corps of Colonial Marines and then, after post-war service in Bermuda, were established as a community in the south of Trinidad in 1815–1816. They were settled in an area populated by French-speaking Catholics and retained cohesion as an English-speaking, Baptist community. It is sometimes said that the term "Merikins" derived from the local patois, but as many Americans have long been in the habit of dropping the initial "A" it seems more likely that the new settlers brought that pronunciation with them from the United States. Some of the Company villages and land grants established back then still exist in Trinidad today.

The Corps of Colonial Marines were two different British Marine units raised from former black slaves for service in the Americas, at the behest of Alexander Cochrane. The units were created at two separate periods: 1808-1810 during the Napoleonic Wars; and then again during the War of 1812; both units being disbanded once the military threat had passed. Apart from being created in each case by Cochrane, they had no connection with each other.