The capital of Ireland is Dublin, a city with a population of over 1.2 million people. It is the largest city in Ireland and is located on the east coast of the country. Dublin is a major port and has been an important center of commerce and culture for centuries. It is home to many of the country's most iconic landmarks, including Trinity College, St. Patrick's Cathedral, and the Guinness Storehouse. Dublin is also known for its vibrant nightlife and is a popular tourist destination.