Belfast is the capital city and principal port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel. It is the second-largest city on the island of Ireland, with an estimated population of 348,005 in 2022, and a metropolitan area population of 671,559.
AdMust Visit Belfast Attractions. Create Your Personal Travel Guide to Belfast! Visit Titanic Belfast, Belfast Botanic Gardens & Palm House, Ulster Museum and More.