John James McCook Jr. (February 4, 1843 – January 9, 1927) was a chaplain in the Union Army during the American Civil War, and reconstruction era lawyer, professor, and theologian.
He served in the Eastern Theater of the American Civil War as a chaplain with the rank of lieutenant in the 1st [West] Virginia Infantry, a regiment recruited almost exclusively from Ohio.
[1] As a leading layman of the Presbyterian Church, McCook served at the heresy trial of theologian Charles Augustus Briggs in 1892.
From 1895 to 1897 he was president of the board of directors of the Connecticut reformatory, and wrote on prison reform and related topics.
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