Aberystwyth (abɛˈrəstʊɨθ) is a university and seaside town and a community in Ceredigion, Wales. It is the largest town in Ceredigion and from Aberaeron, the county's administrative centre. In 2011, the population of the town was 15,935.
Located in the historic county of Cardiganshire, Aberystwyth means "the mouth of the Ystwyth". It has been a major educational location in Wales since the establishment of University College Wales, now Aberystwyth University, in 1872.
The town is situated on Cardigan Bay on the west coast of Wales, near the confluence of the River Ystwyth and Afon Rheidol. Following the reconstruction of the harbour, the Ystwyth skirts the town. The Rheidol passes through the town. The seafront, with a pier, stretches from Constitution Hill at the north end of the Promenade to the harbour at the south. The beach is divided by the castle. The town is divided into five areas: Aberystwyth Town; Llanbadarn Fawr; Waunfawr; Trefechan; and the most populous, Penparcau.
Aberystwyth is a university town and tourist destination, and forms a cultural link between North Wales and South Wales. Constitution Hill, scaled by the Aberystwyth Cliff Railway, gives access to panoramic views and to other attractions at the summit, including a camera obscura. Scenic Mid Wales landscape within easy reach of the town includes the wilderness of the Cambrian Mountains, whose valleys contain forests and meadows which have changed little in centuries. A convenient way to access the interior is by the preserved narrow-gauge Vale of Rheidol Railway.
Although the town is relatively modern, there are a number of historic buildings, including the remains of the castle and the Old College of Aberystwyth University nearby. The Old College was originally built and opened in 1865 as a hotel, but after the owner's bankruptcy the shell of the building was sold to the university in 1867.
The new university campus overlooks Aberystwyth from Penglais Hill to the east of the town centre.