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John Costello
Born 1850
Place of birth Rouses Point, New York
Allegiance United States of America
Service/branch United States Navy
Rank Ordinary Seaman
Unit USS Hartford
Awards Medal of Honor

John Costello (born 1850, date of death unknown) was a United States Navy sailor and a recipient of the United States military's highest decoration, the Medal of Honor.


Born in 1850 in Rouses Point, New York, Costello joined the Navy from 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.[1]

Costello's official Medal of Honor citation reads:

On board the U.S.S. Hartford, Philadelphia, Pa., 16 July 1876. Showing gallantry, Costello rescued from drowning a landsman of that vessel.[1]

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