Henry Reed Rathbone (July 1, 1837 – August 14, 1911) was a United States military officer and diplomat who was present at the assassination of President Abraham Lincoln. Rathbone was sitting with his fiancée, Clara Harris, next to the President and his wife, Mary Todd Lincoln, when John Wilkes Booth entered the president's box at Ford's Theatre and fatally shot Lincoln in the head. When Rathbone attempted to prevent Booth from fleeing the scene, Booth stabbed and seriously wounded him.