
Country: United Kingdom Cardiff is best known as the capital and largest city of Wales, with a population of 381,516 in 2025. Once a small town, it grew rapidly in the 19th century as a port for coal from the surrounding mining region, earning city status in 1905 and becoming Wales’s capital in 1955. In southeast Wales, it forms part of the Cardiff Capital Region, home to 1.5 million people, while its urban area reaches beyond the county into places including Dinas Powys and Penarth.
