Private John Newman (c. 1785 – 1838) was a member of the Lewis and Clark Expedition.
He was born in Pennsylvania and was a member of captain Daniel Bissell's company of the First Infantry Regiment.
During the expedition in October 1804, he ran into disciplinary problems and was confined for "having uttered repeated expressions of a highly criminal and mutinous nature."
In addition, he was removed from the expedition; however, since they were en route through the wilderness, he continued to travel with them to Fort Mandan.
He performed hard labor and tried to redeem himself in the eyes of the two captains, but was sent back east with the return party in April 1805.