County Derry is in the northern province of Ulster and is part of Northern Ireland.
Londonderry is the major city, other towns include: Coleraine, Limavady and Portstewart
To the east and west of the county lie the valleys of the Bann and Foyle rivers.
The county also borders the shore of Lough Neagh, which is the largest lake in Ireland, and boasts steep cliffs, and wonderful beaches of the Atlantic coast.
The well-preserved 17th-century city wall of is a famous feature.
The name Derry is an anglicized version of the Old Irish name Daire (modern Irish: Doire) meaning “oak grove”.In 1613, the city was granted a Royal Charter by King James I and gained the “London” prefix to reflect the funding of its construction by the London guilds. While the city is more usually known colloquially as Derry,Londonderry is also commonly used and remains the legal name.
The old walled city lies on the west bank of the River Foyle, which is spanned by two road bridges and one footbridge. The city now covers both banks, Cityside on the west and Waterside on the east. The population of the city was 83,652 at the 2001 Census, while the Derry Urban Area had a population of 90,736. The district administered by Derry City and Strabane District Council contains both Londonderry Port and City of Derry Airport.
Derry is close to the border with County Donegal, with which it has had a close link for many centuries. The person traditionally seen as the founder of the original Derry is Saint Colmcille, a holy man from Tír Chonaill, the old name for almost all of modern County Donegal, of which the west bank of the Foyle was a part before 1610