James M. Cumpston (c. 1837 – May 24, 1888) was a Union Army soldier during the American Civil War. He received the Medal of Honor for gallantry during the Valley Campaigns of 1864. Although his military records are under Cumpston, his surname is correctly spelled Compston.
Medal of Honor citation.
The President of the United States of America, in the name of Congress, takes pleasure in presenting the Medal of Honor to Private James M. Cumpston, United States Army, for extraordinary heroism from August to November, 1864, while serving with Company D, 91st Ohio Infantry, in action in the Shenandoah Valley Campaign, Virginia, for capture of flag.