Tynedale was a local government district in Northumberland, England. The district had a resident population of 58,808 according to the 2001 census. The main towns were Hexham, Haltwhistle and Prudhoe. The district contained part of Hadrian's Wall and the southern part of Northumberland National Park.
With an area of 2,219 km² it was the second-largest English district, after the East Riding of Yorkshire. It was bigger than several English counties, including Nottinghamshire, Leicestershire and Hertfordshire. It was also the second-least densely populated district. From Wikipedia
