As with the town, its name is subject to a dispute, with the form Derry preferred by nationalists and unionists preferring Londonderry. The name Derry is officially used in the Republic, while the British authorities use the name Londonderry.
Unlike the town, historically there was not a preceding County Derry: it was established by combining the former County of Coleraine with small parts of Counties Antrim, Donegal, and Tyrone at the behest of the London companies so that they could control both banks of the mouths of the rivers Foyle and Bann and have access to sufficient wood for construction.
Since 1973, administration has been divided between district councils. The districts covering the county are: Derry City; the districts of Coleraine, Limavady, and Magherafelt; and part of the district of Cookstown, which is largely in County Tyrone.
County Londonderry or CountyDerry (Doire in Irish) is one of the six counties of Northern Ireland, in the province of Ulster.
The name Derry is officially used in the Republic, while the British authorities use the name Londonderry.
The councils covering the county are Coleraine Borough Council, Derry City Council, Limavady Borough Council, and Magherafelt District Council; and part of Cookstown District Council, which is largely in CountyTyrone.