The 3rd West Virginia Cavalry Regiment was a cavalry regiment that served in the Union Army during the American Civil War. In 1864, the regiment had an important part in the Battle of Moorefield, where a surprise attack led by General William W. Averell routed Confederate cavalry. The regiment also fought in the latter part of General Philip H. Sheridan's Valley Campaign, and was part of Capehart's Fighting Brigade in General George Armstrong Custer's Third Division. It was present at General Robert E. Lee's surrender of the Army of Northern Virginia at the Battle of Appomattox Court House.