George Crawford Platt (February 17, 1842 – June 20, 1912) was an Irish American who served with the federal army of the United States (also known as the Union Army) during the American Civil War. A private with Troop H of the 6th U.S. Cavalry, he was awarded the Medal of Honor, America's highest award for valor in combat, for protecting the American flag in hand-to-hand combat near Fairfield, Pennsylvania, during the Battle of Gettysburg on July 3, 1863.