Commercial, tourist, and educational centre in Ceredigion, mid-Wales, situated at the mouths of the rivers Ystwyth and Rheidol in Cardigan Bay; population (2001) 15,900. It is the site of the University College of Wales (1872), which dominates the town, and during term time the population swells to around 20,000 (2000 est). Aberystwyth is the largest town in mid-Wales and houses many of Wales's national organizations and institutions.
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