NEWTON, a market-town of the county of Montgomery, in South Wales, distant 178 miles from London, and sometimes called Trenewydd. It is situated in a pleasant and fertile district on the banks of the Severn. It shares with Montgomery and four other towns the right of electing one member to the House of Commons. It has a market, which is held on Saturday. The population amounted in 1801 to 990, in 1811 to 2025, in 1821 to 3486, and in 1831 to 4550.