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'.
Trinity River (California) Less than 2 percent of the watershed is urbanized. About 86 percent of the Trinity River watershed is in Trinity County. As of the 2010 census, the population of Trinity County was 13,786. With a population density of 4.3 people per square mile (1.7/km) it is one of the least densely populated counties in California. Only , or about 14 percent of the western part of the basin, is in Humboldt County. The part of the Trinity River watershed in Humboldt County is also sparsely populated, with the exception of the Hoopa Valley Reservation, which was home to 2,930 people