Dublin Port is Ireland's biggest sea port. It has both historical and contemporary economic importance. Approximatively two-thirds of the Republic of Ireland's port traffic goes via Dublin Port. Recently, the port and its land, mostly at the eastern end of Dublin's Northside, were valued at €25 billion - €30 billion.
The modern Dublin Port is located either side of the River Liffey, out to its mouth. On the north side of the river, the main part (205 hectares / 507 acres) of the port lies at the end of East Wall and North Wall, from Alexandra Quay. The element of the port on the south side of the river is much smaller (51 hectares / 126 acres), and lies at the beginning of the Pigeon House peninsula.