Caerleon is a town and community in Newport, Wales. Situated on the River Usk, it lies 5 miles (8 km) northeast of Newport city centre, and 5.5 miles (9 km) southeast of Cwmbran. Caerleon is of archaeological importance, being the site of a notable Roman legionary fortress, Isca Augusta, and an Iron Age hillfort. Close to the remains of Isca Augusta are the National Roman Legion Museum and the Roman Baths Museum. The town also has strong historical and literary associations: Geoffrey of Monmouth elevated the significance of Caerleon as a major centre of British history in his Historia Regum Britanniae, and Alfred Lord Tennyson wrote Idylls of the King (1859–1885) while staying in Caerleon.

Newport is a city and county borough in Wales, situated on the River Usk close to its confluence with the Severn Estuary, 12 mi (19 km) northeast of Cardiff. The population grew considerably between the 2011 and the 2021 census, rising from 145,700 to 159,587, the largest growth of any unitary authority in Wales. Newport is the third-largest principal authority with city status in Wales, and sixth most populous overall. Newport became a unitary authority in 1996 and forms part of the Cardiff-Newport metropolitan area, also known as the Cardiff Capital Region.