Deborah L. "Debbie" Halvorson (born March 1, 1958) is the former U.S. Representative for Illinois's 11th congressional district, serving from 2009 until 2011. Previously, she served in the Illinois Senate from 1997 through 2009. She is a member of the Democratic Party. In September 2011, she filed to run in the newly redistricted 2nd congressional district but was defeated in the Democratic primary by the incumbent, Jesse Jackson, Jr.