David Whitmer was a leader in the Church of Jesus Christ of Latter Day Saints who eventually became the most interviewed of the Three Witnesses to the Book of Mormon's golden plates.

The Three Witnesses is the collective name for three men connected with the early Latter Day Saint movement who stated that an angel had shown them the golden plates from which Joseph Smith translated the Book of Mormon; they also stated that they had heard God's voice, informing them that the book had been translated by divine power. The Three are part of twelve Book of Mormon witnesses, who also include Smith and the Eight Witnesses.