David Bell Birney IV (November 26, 1929 – February 13, 2004) was twelfth bishop of the Episcopal Diocese of Idaho.
After he was ordained deacon, Birney became curate of St John's Church in York, Pennsylvania.
He was ordained priest on December 17, 1955, by Bishop J. Thomas Heistand of Harrisburg.
In 1969 he became a missionary in the Church of Uganda, where he served till 1972 as a tutor at the Bishop Tucker Theological College.
Between 1976 and 1982 he served as coordinator of oversees missionary work of the Episcopal Church and a member of the board of the National Hunger Committee of the Presiding Bishop's Fund for World Relief.