b. 1850 Rouses Point, New York. d. 11/04/1887 Chelsea, Massachusetts.
DATE OF MOH ACTION: 16/07/1876 USS Hartford.
Born in 1850 in Rouses Point, New York, Costello joined the Navy while living in that state. By July 16, 1876, he was serving as an ordinary seaman on the USS Hartford. On that day, while Hartford was in Philadelphia, Pennsylvania, he rescued a shipmate who was a landsman from drowning. For this action, he was awarded the Medal of Honor eleven days later, on July 27.
On board the U.S.S. Hartford, Philadelphia, Pa., 16 July 1876. Showing gallantry, Costello rescued from drowning a landsman of that vessel.
BURIAL LOCATION: WOODLAWN CEMETERY, EVERETT, MASSACHUSETTS.
LOCATION OF MEDAL: UNKNOWN.