The 2008 United States Senate election in Arkansas was held on November 4, 2008. Incumbent Democratic U.S. Senator Mark Pryor ran for a second term. No Republican filed to challenge him, and his only opponent was Green Party candidate Rebekah Kennedy. Pryor won re-election with almost 80% of the vote, despite Republican John McCain winning the state by nearly 20 points in the concurrent presidential election. As of 2022, this was the last time the Democrats won a U.S. Senate election in Arkansas.