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County Londonderry or County Derry is one of the six counties of Northern Ireland. It is named for its main town (now city) and administrative centre, Londonderry (or Derry) and the Plantation of Ulster by London livery companies.
As with the town, its name is subject to a dispute, with the form Derry preferred by nationalistss and unionists preferring Londonderry.
Unlike the town, historically there was not a preceding County Derry: it was established by combining the former County of Coleraine with 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.
Places in the county -