Dublin (pronounced [ˈdʌblɨn] or [ˈdʊblɨn] or [ˈdʊbəlɪn]) is both the largest city and capital of Ireland. It is officially known in Irish as Baile Átha Cliath ([bˠalʲə aːha klʲiəh]) or Áth Cliath ([aːh cliə(ɸ)]); the English name comes from the Irish Dubh Linn meaning "black pool". It is located near the midpoint of Ireland's east coast, at the mouth of the River Liffey and at the centre of the Dublin Region.

Originally founded as a Viking settlement, it evolved into the Kingdom of Dublin and became the island's primary city following the Norman invasion. Today, it is ranked 10th (up from 13th in 2008) in the Global Financial Centres Index, has one of the fastest growing populations of any European capital city, and is listed by the GaWC as a global city, with a ranking of Alpha - which places Dublin amongst the top 25 cities in the world.

Dublin is a historical and contemporary cultural centre for the island of Ireland as well as a modern centre of education, the arts, administrative function, economy and industry.