Ulster is the northerly province of the island of Ireland. Ulster was originally known by the Celtic to encompass the counties of Donegal, Cavan, Monaghan, Fermanagh, Tyrone, Derry, Antrim, Down, and Armagh name of Ulaid (Ulster in English). The earliest written sources about the history of Ulster date back to the 7th century.
The counties of Antrim, Fermanagh, Tyrone, Derry, Down, and Armagh make up Northern Ireland. A diverse province with a population in excess of 1,800,000, Ulster closely follows Leinster as the most populous area in the island of Ireland. The principal business center is the grand city of Belfast.
Abundant with mountains and Lakelands, Ulster offers spectacular scenery including the extraordinary Giants Causeway in the north of the province, now designated a world heritage site. Inland waterways provide some of the best fishing in Ireland.