North Durham is the name for that part of the County Palatine of Durham locally situate in Northumberland. It consists of the detached parts of Norhamshire, Islandshire and Bedlingtonshire along with the Farne Islands.
The population in 2011 was 40,264.
About the beginning of the 10th century, Cutheard the second bishop of Chester purchased Bedlingtonshire out of the funds of St Cuthbert and gave it to the see. Islandshire and Norhamshire were granted by King Oswald to the first Christian bishop in his dominions and the donation was confirmed by several succeeding monarchs including Alfred the Great and his dependent Guthred king of Northumberland.