Samuel Mercer Clark (October 11, 1842 – August 11, 1900) was a two-term Republican U.S. Representative from Iowa's 1st congressional district at the end of the 19th century.

Senator) George G. Wright[1] and was admitted to the Iowa bar in 1864.

He replaced John H. Gear, whom the Iowa General Assembly had chosen to serve as a U.S.

Two years later Clark won re-election, and served in the Fifty-fifth Congress.

This article incorporates public domain material from the Biographical Directory of the United States Congress