Port cities and towns in Northern Ireland

Belfast (, , , ; from ) 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 largest city in Northern Ireland and the second-largest city in Ireland (after Dublin), with an estimated population of in , and its metropolitan area has a population of 671,559.

city in Northern Ireland, United Kingdom

Larne (, , the name of a Gaelic territory) is a town on the east coast of County Antrim, Northern Ireland, with a population of 18,853 at the 2021 census. It is a major passenger and freight roll-on roll-off port. Larne is within the Mid and East Antrim Borough Council area. Together with parts of the neighbouring districts of Antrim and Newtownabbey and Causeway Coast and Glens, it forms the East Antrim constituency for elections to the Westminster Parliament and Northern Ireland Assembly. The civil parish is in the historic barony of Glenarm Upper.

Carrickfergus ( , meaning "Fergus' rock") is a large town in County Antrim, Northern Ireland. It sits on the north shore of Belfast Lough, from Belfast. The town had a population of 28,141 at the 2021 census. It is County Antrim's oldest town and one of the oldest towns in Ireland as a whole. Carrickfergus Castle, built in the late 12th century at the behest of Anglo-Norman knight John de Courcy, was the capital of the Earldom of Ulster. After the earldom's collapse, it remained the only English outpost in Ulster for the next four centuries. Carrickfergus was the administrative centre for Carr

town in County Antrim, Northern Ireland, UK

Portstewart is a small seaside town in County Londonderry, Northern Ireland. It had a population of 7,854 people in the 2021 United Kingdom census. It is a seaside resort, neighbouring both Coleraine in County Londonderry and Portrush in County Antrim. Its harbour and scenic coastal paths form an Atlantic promenade leading to a two-mile beach (Portstewart Strand), popular with holidaymakers in summer and surfers year-round. The town is located within the Barony of the North East Liberties of Coleraine.

Warrenpoint is a small port town and civil parish in County Down, Northern Ireland. It sits at the head of Carlingford Lough, south of Newry, and is separated from the Republic of Ireland by a narrow strait. The town is beside the village of Rostrevor and is overlooked by the Mournes and Cooley Mountains. Warrenpoint sprang up within the townland of Ringmackilroy (), and is locally nicknamed "The Point", which also represents the town's full name in Irish, An Pointe.

Kilkeel () is a small town and civil parish on the Irish Sea coast of County Down, Northern Ireland. It is the main fishing port on the Down coast, and its harbour is home to the largest fishing fleet in Northern Ireland. It had a population of 6,633 people at the 2021 census. The town contains the ruins of a 14th-century church and fort, winding streets and terraced shops. It lies just south of the Mourne Mountains, in the historic barony of Mourne, and is the southernmost town in Northern Ireland.

thumb|right|250px|Jordan's Castle, 2007 thumb|right|250px|Bathing house

Portavogie () is a village, townland and fishing port in County Down, Northern Ireland. It lies within the Ards and North Down Borough and is the easternmost settlement in Ireland. It had a population of 2,122 people in the 2011 Census.

Strangford (from Old Norse Strangr fjörðr, meaning "strong sea-inlet") is a small village at the mouth of Strangford Lough, on the Lecale peninsula in County Down, Northern Ireland. It had a population of 475 at the 2001 census.

right|thumb|Portaferry from the grounds of Castle Ward, on the opposite bank of Strangford Lough