John Flavel Clark (December 10, 1784 – October 7, 1853) was a Presbyterian clergyman who served as Chaplain of the United States Senate.
Joseph Clark also served on George Washington's general staff during the Revolutionary War.
[3] He was chosen to be a tutor at Princeton, where he continued his divinity studies under its president Ashbel Green.
He was called to be stated supply at First Presbyterian Church Flemington, New Jersey, and then to be its pastor, resulting in his ordination in June 1815.
He was elected Chaplain of the Senate on November 18, 1818; this was the 15th United States Congress, meeting in the Old Brick Capitol in Washington.