Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Loving County, Texas of 2000. However, as of 2010, this is no longer true. The county had been the least populous county in the United States, with a 2010 census population of only 82 persons (an increase of 22.4% over the 2000 figure of 67 residents), but the 2015 estimate by the US Census Bureau places it as the second least populous county in the US. With an average of only 0.0646 inhabitants/km (0.167/sq mi) as of 2015, the county is also the least densely populated county outside of Alaska. (Lake and Peninsula Borough and North Slope Borough in Alaska are both lower,