Bus transport in Cardiff, the capital and most populous city in Wales, forms the major part of the city's public transport network, which also includes an urban rail network, Waterbus and international airport. Cardiff is a major city of the United Kingdom and a centre of employment, retail, business, government, culture, media, sport and higher education.

Transport in Cardiff, capital and most populous city in Wales involves road, rail, bus, water and air. It is a major city of the United Kingdom and a centre of employment, government, retail, business, culture, media, sport and higher education.