The Act Prohibiting Importation of Slaves was passed in 1808 under the so-called Star-Spangled Banner flag, when there were 15 states in the Union, closing the transatlantic slave trade and setting the stage for the interstate slave trade in the U.S. Over 50 years later, in 1865, the last American slave sale was made somewhere in the rebel Confederacy.[3] In the intervening years, the politics surrounding the addition of 20 new states to the Union had been almost overwhelmingly dominated by whether or not those states would have legal slavery.[4]
Slavery was widespread, so slave trading was widespread, and "When a planter died, failed in business, divided his estate, needed ready money to satisfy a mortgage or pay a gambling debt, or desired to get rid of an unruly Negro, traders struck a profitable bargain."[5] A slave trader might have described himself as a broker, auctioneer, general agent, or commission merchant,[6] and often sold real estate, personal property, and livestock in addition to enslaved people.[7] Many large trading firms also had field agents, whose job it was to go to more remote towns and rural areas, buying up enslaved people for resale elsewhere.[3] Field agents stood lower in the hierarchy, and are generally poorly studied, in part due to lack of records, but field agents for Austin Woolfolk, for example, "served only a year or two at best and usually on a part-time basis. No fortunes were to be made as local agents."[8] On the other end of the financial spectrum from the agents were the investors—usually wealthy planters like David Burford,[9] John Springs III,[10] and Chief Justice John Marshall[11]—who fronted cash to slave speculators. They did not escort coffles or run auctions themselves, but they did parlay their enslaving expertise into profits. Also, especially in the first quarter of the 19th century, cotton factors, banks, and shipping companies did a great deal of slave trading business as part of what might be called the "vertical integration" of cotton and sugar industries.
Countless slaves were also sold at courthouse auctions by county sheriffs and U.S. marshals to satisfy court judgments, settle estates, and to "cover jail fees"; individuals involved in those sales are not the primary focus of this list. People who dealt in enslaved indigenous persons, such as was the case with slavery in California, would be included. Slave smuggling took advantage of international and tribal boundaries to traffic slaves into the United States from Spanish North American and Caribbean colonies, and across the lands of the Cherokee, Chickasaw, Choctaw, Muskogee, Seminole, et al., but American-born or naturalized smugglers, Indigenous slave traders, and any American buyers of smuggled slaves would be included.
Note: Research by Michael Tadman has found that "'core' sources provide only a basic skeleton of a much more substantial trade" in enslaved people throughout the South, with particular deficits in records of rural slave trading, already wealthy people who speculated to grow their wealth further, and in all private sales that occurred outside auction houses and negro marts.[10] This list represents a fraction of the "many hundreds of participants in a cruel and omnipresent" American market.[12]
List is organized by surname of trader, or name of firm, where principals have not been further identified.
We must have a market for human flesh, or we are ruined.
— Frederick Douglass, on the predominant message from the Southern states to the U.S. government before the American Civil War, The Frederick Douglass Papers, vol. II, p. 405