Samuel Dale Brownback (born September 12, 1956) is the senior United States Senator from the U.S. state of Kansas. During 2007, he was a candidate in the Republican primaries for the 2008 Presidential election. He has announced that he will not seek re-election to the Senate in 2010, and is expected to run for Governor of Kansas in the 2010 election.

Sam Brownback was born in Parker, Kansas to Nancy and Robert Brownback. He was raised in a farming family in Parker, Kansas; his ancestors settled in Kansas after leaving Pennsylvania following the Civil War. Brownback was state president of Future Farmers of America, and was its national vice president from 1976 to 1977. While at Kansas State University, he was elected student body president and was a member of Alpha Gamma Rho. He received his J.D. from the University of Kansas in 1982.

After college, Brownback spent approximately a year working as a broadcaster; he hosted a weekly half-hour show.