The Port of Holyhead is a commercial and ferry port in Anglesey, United Kingdom, handling more than 2 million passengers each year. It covers an area of 240 hectares, and is operated by Stena Line Ports Ltd. The port is the principal link for crossings from north Wales and central and northern England to Ireland. The port is partly on Holy Island and partly on Salt Island. It is made up of the Inner Harbour, the Outer Harbour and the New Harbour, all sheltered by the Holyhead Breakwater which, at 2.7 kilometres, is the longest in the UK.