Lisburn is a city in Northern Ireland. It is 8 mi southwest of Belfast city centre, on the River Lagan, which forms the boundary between Coun…Lisburn is a city in Northern Ireland. It is 8 mi southwest of Belfast city centre, on the River Lagan, which forms the boundary between County Antrim and County Down. First laid out in the 17th century by English and Welsh settlers, with the arrival of French Huguenots in the 18th century, the town developed as a global centre of the linen industry.