Frank Dean Lucas (born January 6, 1960) is an American politician serving as the U.S.
Representative for Oklahoma's 3rd congressional district, since 2003, having previously represented the 6th district, from 1994 to 2003.
He is a member of the Republican Party and serves as the ranking minority member of the House Committee on Science, Space and Technology.
His district, numbered as the 6th district from 1994 to 2003, is the largest congressional district in the state and one of the largest in the nation that does not cover an entire state.
It covers 34,088.49 square miles and stretches from the Panhandle to the fringes of the Tulsa suburbs—almost half of the state's land mass.