Carnarvon, Or Caernarvon, the chief town of Carnarvonshire, Wales, a parliamentary and municipal borough, situated upon the Menai strait, at the mouth of the Seiont, 55 m. W. S. W. of Liverpool; pop. in 1871, 8,512. It is the terminus of railways from Bangor on the north and Pwlheli on the south. A railway also runs 8 m. to Llanberis, the point from which excursions are made for the ascent of Snowdon. Carnarvon is frequented in summer for sea bathing, and there is a handsome bathing establishment, and a terrace walk along the strait, terminating in a pier. The harbor admits vessels of 400 tons burden. The older and smaller part of the town is surrounded by an ancient wall. At the S. W. corner of the town is a large castle, in the tower of which Edward II., the first English prince of Wales, was born. The castle with its courtyard is a mile in circuit. Over its gateway is a statue of Edward I. Carnarvon was the site of the Roman station Segontium.