Matthew O. Williams is a sergeant major in the United States Army. He received the Medal of Honor on October 30, 2019, for his actions on April 6, 2008, as a member of Operational Detachment Alpha 3336, Special Operations Task Force 11, Combined Joint Special Operations Task Force-Afghanistan in the Battle of Shok Valley.

The Battle of Shok Valley, also known as Operation Commando Wrath, was a joint U.S.-Afghan raid designed to kill or capture Gulbuddin Hekmatyar, the leader of Hezb-e-Islami Gulbuddin (HIG) in the Shok Valley of Nuristan Province of Afghanistan on 6 April 2008. Ten soldiers belonging to U.S Army special forces and their combat cameraman were awarded the Silver Star for bravery, the greatest number of such awards for a single battle since the Vietnam War. In 2018, Special Forces medic Ronald J. Shurer's Silver Star was upgraded to the Medal of Honor for his actions during the battle. In 2019, Special Forces weapons sergeant Matthew O. Williams's Silver Star was upgraded to the Medal of Honor for his actions during the battle. In addition SrA Zachary Rhyner, ODA 3336's attached Air Force Combat Controller, was awarded the Air Force Cross.