In 1806, Montgomery was a successful candidate for Congress. 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. He served from April 29, 1811 to February 11, 1818.[1]
Montgomery served again in the House of Delegates in 1819. He was Mayor of Baltimore from 1820 to 1822 and again in 1824 to 1826.[1]
Personal life
Montgomery was married first to Mary Hanes or Harris, also called Polly. In 1809, he married Maria Nicholson (1775–1868).[2] Maria was the daughter of Commodore James Nicholson and was the sister of Catherine "Kitty" Nicholson (wife of William Few),[3] Hannah Nicholson (wife of Albert Gallatin),[4] Frances "Fanny" Nicholson (husband of Joshua Seney),[5] James Witter Nicholson (husband of Ann Griffin, daughter of Isaac Griffin),[6] and Jehoiadden Nicholson (wife of James Chrystie).[7][8] His children included sons John and James Nicholson Montgomery.[9]
He died in Baltimore on July 17, 1828. He was buried in the cemetery of the Methodist Episcopal Church in the Bel Air hamlet of Emmorton. This cemetery is also known as Mount Carmel Cemetery, Bel Air Methodist Episcopal Church Cemetery, and Mount Carmel Methodist Church Cemetery.