Peter Marshall was a Scots-American preacher, pastor of the New York Avenue Presbyterian Church in Washington, DC and was appointed as Chaplain of the United States Senate.
He was called as the pastor of the First Presbyterian Church, a small, rural church in Covington, Georgia. After a brief pastorate, Marshall accepted a call to Atlanta's Westminster Presbyterian Church in 1933.
In 1937 Marshall became pastor of the New York Avenue Presbyterian Church in Washington, DC. In 1946 he was appointed as US Senate Chaplain, serving from January 4, 1947 until his sudden death of a heart attack just over two years later, at age 46.
Marshall is buried at Fort Lincoln Cemetery in Brentwood, Maryland.