PRESTEIGN, a market-town of the county of Radnor, in South Wales. It is the county town, in which the assizes are held, being 151 miles from London, and 14 from Llandymoor, and is situated in a rich vale on the river Lug. The county jail is a fine building, and around the town are some pleasant walks and picturesque views. There is a good market, which is held on Saturday. The population was, in 1801, 1152; in 1811, 1211; in 1821, 1387; and in 1831, 1629; but the parish, a part of which is within the English county of Hereford, contained at the last census 3282 inhabitants.