Addison Graves "Joe" Wilson Sr. (born July 31, 1947) is an American politician and attorney serving as the U.S. representative for South Carolina's 2nd congressional district since 2001. A member of the Republican Party, his district stretches from Columbia to the Georgia–South Carolina border. He served as the South Carolina state senator from the 23rd district from 1985 to 2001.

Wilson is a member of the House Republican Policy Committee and an assistant Republican whip.

In September 2009, Wilson interrupted a speech by U.S. President Barack Obama to a joint session of Congress, shouting, "You lie!" The incident resulted in a reprimand by the House of Representatives.