High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Devizes is a market town and civil parish in the English county of Wiltshire, in the southern United Kingdom. It has a population of about 15,000 in 2009. It serves as a centre for banks, solicitors and shops, with a large open market place where a market is held once a week. It has over five hundred listed buildings, a large open Green at the heart of the town, splendid churches and an elegant Town Hall. Its development has grown around an 11th century Norman castle.