Irish Sea is a body of water between Ireland on the west and England and Wales on the east. It opens to the Atlantic Ocean through the North Channel on the north and St. George’s Channel on the south. The wide St. George’s Channel, which is south of Dublin, is often considered part of the Irish Sea.
The sea is about 140 miles (225 kilometers) wide at its widest point. It measures about 85 miles (140 kilometers) long excluding St. George’s Channel and 190 miles (306 kilometers) long including the channel. A relatively shallow sea, it is less than 300 feet (90 meters) deep in most places. The sea has two large islands. They are the Isle of Man, in the north-central section; and Anglesey, off the coast of Wales. Two bridges join Anglesey to the mainland. Dublin, Ireland; and Liverpool, England, rank as the chief ports on the Irish Sea.
