[1] Montgomery was educated in Carlisle, studied law, was admitted to the bar in 1791 and moved to Harford County, Maryland to begin a practice.
He won reelection in 1808 and 1810, and served in the 10th, 11th, and 12th Congresses, holding office from March 4, 1807 until he resigned on April 29, 1811.
[1] Montgomery resigned from Congress and relocated to Baltimore in order to accept appointment as Attorney General of Maryland.
[1] During the War of 1812 Montgomery was appointed a captain in the militia and commanded the Baltimore Union Artillery, and he took part in the Battle of North Point.
He was buried in the cemetery of the Methodist Episcopal Church in the Bel Air hamlet of Emmorton.