The capital city of Ireland is Dublin. Meaning "black pool," Dublin is located on the Irish Sea. As of the 2009 census, Dublin boasts a population of more than 1 million residents.
Originally founded as a Viking settlement, it developed into the Kingdom of Dublin. Following the Norman Invasion, Dublin became the principal city. Today, Dublin is the only major urban area in Ireland.
With the 1922 partition of Ireland, Dublin became the capital of the Irish Free State. On Dec. 6, 1921, Ireland declared their independence from the UK through a treaty. Today, the official name of Ireland is the Republic of Ireland.