Northumberland 1542 and Hexhamshire in 1572. Islandshire, Bedlingtonshire and Norhamshire were incorporated into Northumberland in 1844. Tynemouth and other settlements in North Tyneside were transferred to Tyne and Wear in 1974 under the Local Government Act 1972. Lying on the Anglo-Scottish border, Northumberland has been the site of a number of battles. The county is noted for its undeveloped landscape of high moorland, now largely protected as the Northumberland National Park. Northumberland is the least densely populated county in England, with only 62 people per square kilometre. Northumberland originally meant 'the land of the people living north of the River Humber'.
Maine people per square mile, making it the least densely populated state in New England, the American northeast, the eastern seaboard, of all of the states with an Atlantic coastline and of all of the states east of the Mississippi River. The mean population center of Maine is located in Kennebec County, just east of Augusta. The Greater Portland metropolitan area is the most densely populated with nearly 40% of Maine's population. Portland's estimated population in 2016 was 66,937. As explained in detail under "Geography", there are large tracts of uninhabited land in some remote parts of the interior. Maine has