Oliver H. P. Cowdery (October 3, 1806 – March 3, 1850) was, with Joseph Smith, Jr., an important participant in the formative period of the Latter Day Saint movement between 1829 and 1836, becoming one of the Three Witnesses of the Book of Mormon's golden plates, one of the first Latter Day Saint apostles, and the Second Elder of the church.

Oliver Hervy Pliny Cowdery (3 October 1806 – 3 March 1850) was a scribe to Joseph Smith, Jr. during the production of the Book of Mormon. He was one of the Three Witnesses of the gold plates from which the Book of Mormon is said to have been translated. Cowdery became the Second Elder and an apostle of the Church of Christ.