Liberia is a country in West Africa founded by free people of color from the United States. The emigration of African Americans, both freeborn and recently emancipated, was funded and organized by the American Colonization Society (ACS). The mortality rate of these settlers was the highest among settlements reported with modern recordkeeping. Of the 4,571 emigrants who arrived in Liberia between 1820 and 1843, only 1,819 survived (39.8%).

The American Colonization Society (ACS), initially the Society for the Colonization of Free People of Color of America, was an American organization founded in 1816 by Robert Finley to encourage and support the repatriation of freeborn people of color and emancipated slaves to the continent of Africa. It was modeled on an earlier British colonization in Africa, which had sought to resettle London's "black poor".