Lincoln Clark (August 9, 1800 – September 16, 1886) was a lawyer and one-term Democratic U.S. Representative from Iowa's 2nd congressional district. His life began and ended in the same small town in western Massachusetts, but included service in every branch of Alabama state government, the U.S. Congress, and the Iowa General Assembly. Clark eventually left Iowa to practice law in Chicago, Illinois.He was appointed United States Register in Bankruptcy in 1866.