John Costello (Medal of Honor)

John Costello was a United States Army soldier who received the Medal of Honor for his actions during the American Civil War. He served as a Private in Company F, 61st New York Infantry. On April 2, 1865, at Petersburg, Virginia, Costello captured the battle flag of the 31st Virginia Infantry, Confederate States of America, exhibiting gallantry that earned him the nation's highest military decoration. His citation notes his valor in the face of the enemy. He was awarded the Medal of Honor on May 12, 1865. Further details about his life beyond his military service are scarce, but his bravery at Petersburg remains a significant part of his legacy.