Samuel Bruce Graves Jr. (born November 7, 1963) is an American politician serving as the United States representative for Missouri's 6th congressional district, serving since 2001. He is a member of the Republican Party. The district stretches across most of the northern third of the state, from the Kansas border to the Illinois border. The bulk of its population lives in the northern part of the Kansas City area, including the northern fourth of Kansas City. Graves is the dean of Missouri's congressional delegation.