Cynthia Marie Lummis Wiederspahn (born September 10, 1954) is an American politician who was the U.S. Representative for Wyoming's at-large congressional district, serving from 2009 to 2017. She is a member of the Republican Party. She previously served as a State Representative (1979–1983, 1985–1993), State Senator (1993–1995), and State Treasurer (1999–2007).
