Swansea (; Welsh: Abertawe [abɛrˈtawɛ]) is a coastal city and county, officially known as the City and County of Swansea (Welsh: Dinas a Sir Abertawe) in Wales. The county area includes Swansea Bay (Welsh: Bae Abertawe) and the Gower Peninsula. Swansea's position on the southwest coast of Wales is within the historic county boundaries of Glamorgan and the ancient Welsh commote of Gŵyr. Swansea is the second largest city in Wales and the twenty-fifth largest city in the United Kingdom. Swansea is the second most populous local authority area in Wales with a population of 241,300 in 2014. Together with Neath and Port Talbot, Swansea formed a wider Urban Area of 300,352 in 2011.
During the 19th-century industrial heyday, Swansea was the key centre of the copper-smelting industry, earning the nickname Copperopolis.