John O'Neal (c. 1841—after 1872) was an Irish-born United States Navy sailor who received the Medal of Honor for heroism on April 12, 1872.

Kansas, O'Neal displayed great coolness and self-possession at the time Comdr.

A. F. Crosman and others were drowned near Greytown, Nicaragua, 12 April 1872, and by personal exertion prevented greater loss of life.

[1] This article incorporates public domain material from websites or documents of the United States Army Center of Military History.

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