|Place of birth||Rouses Point, New York|
|Allegiance||United States of America|
|Service/branch||United States Navy|
|Awards||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.
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.
- ↑ 1.0 1.1 "Medal of Honor recipients - Interim Awards, 1871–1898". Medal of Honor citations. United States Army Center of Military History. August 5, 2010. http://www.history.army.mil/html/moh/int1871-98.html. Retrieved August 11, 2010.
- "John Costello". Hall of Valor. Military Times. http://valor.militarytimes.com/recipient.php?recipientid=1714. Retrieved August 11, 2010.
- "John Costello". Claim to Fame: Medal of Honor recipients. Find a Grave. http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=50351590. Retrieved August 11, 2010.
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