The Port of Belfast is Northern Ireland's principal maritime gateway, serving the Northern Ireland economy and increasingly that of the Republic of Ireland. About 60% of Northern Ireland's seaborne trade and 20% of the entire island's is handled by the Port which receives over 6000 vessels each year.

The Port is also a major centre of industry and commerce - its Harbour Estate is home to some of Northern Ireland's most important urban regeneration projects and it is the region's leading logistics & distribution hub.

With 1.2 million passengers and half a million freight units annually, Belfast is Ireland's busiest ferry port. It is also the island's leading dry bulk port, dominating the market with regard to imports of grain and animal feeds, coal, fertilisers and cement, and exports of scrap and aggregates. Over 95% of Northern Ireland's petroleum and oil products are also handled at the Port.