Mark (?-September 18, 1755) (sometimes called Mark Codman) was an African-American slave owned by Captain John Codman (1696-1755) of Massachusetts in Charlestown, Boston 20 years before the American Revolutionary War. Though some texts refer to Mark as "Mark Codman", he was probably not referred to as such during his life as giving a slave the surname of his master was not commonly done with New England slaves. The contemporary documents from the investigation and trial only use Mark for his name.