Islandshire was an area of

Northumberland Northumberland () is a county in Northern England, one of two counties in England which border with Scotland. Notable landmarks in the county include Alnwick Castle, Bamburgh Castle, Hadrian's Wall and Hexham Abbey. It is bordered by land ...

, England, comprising

Lindisfarne Lindisfarne, also called Holy Island, is a tidal island off the northeast coast of England, which constitutes the civil parish of Holy Island in Northumberland. Holy Island has a recorded history from the 6th century AD; it was an important ...

or Holy Island, plus five parishes on the mainland. It is historically associated with the

Bishop of Durham The Bishop of Durham is the Church of England, Anglican bishop responsible for the Diocese of Durham in the Province of York. The diocese is one of the oldest in England and its bishop is a member of the House of Lords. Paul Butler (bishop), Pau ...

, and was administratively an

exclave An enclave is a territory (or a small territory apart of a larger one) that is entirely surrounded by the territory of one other state or entity. Enclaves may also exist within territorial waters. ''Enclave'' is sometimes used improperly to deno ...

of County Palatinate of Durham. It was transferred to the county of

by the

Counties (Detached Parts) Act 1844 The Counties (Detached Parts) Act 1844 (7 & 8 Vict. c. 61), which came into effect on 20 October 1844, was an Act of Parliament of the United Kingdom which eliminated many outliers or exclaves of counties in England and Wales for civil purpose ...

, becoming a

hundred 100 or one hundred (Roman numeral: C) is the natural number following 99 and preceding 101. In medieval contexts, it may be described as the short hundred or five score in order to differentiate the English and Germanic use of "hundred" to d ...

. It formed part of the

Norham and Islandshires Rural District Norham and Islandshires was a rural district in Northumberland, England from 1894 to 1974. The district was formed under the Local Government Act 1894 from the Berwick rural sanitary district. It contained all the historic area of Norhamsh ...

from 1894 until 1974, and then formed part of the

borough of Berwick-upon-Tweed Berwick-upon-Tweed was a local government district and borough in Northumberland in the north-east of England, on the border with Scotland. The district had a resident population of 25,949 according to the 2001 census, which also notes that ...

district within the County of Northumberland.Norham and Islandshires RD Northumberland through time , Administrative history of Local Government District: hierarchies, boundaries
/ref> In 2009 the borough of Berwick-upon-Tweed was abolished as part of wider structural changes to local government in England, with the area now falling under the unitary council of

Northumberland County Council Northumberland County Council is a unitary authority in North East England. The population of the non-metropolitan unitary authority at the 2011 census was 316,028. History It was formed in 1889 as the council for the administrative county of ...

. The area, combined with Norham, still forms one of the unitary council's electoral divisions today. It consisted of the parishes of Ancroft, Belford, Elwick, Holy Island, Kyloe and

Tweedmouth Tweedmouth is part of the town of Berwick-upon-Tweed in Northumberland, England. It is located on the south bank of the River Tweed and is connected to Berwick town centre, on the north bank, by two road bridges and a railway bridge. Tweedmouth ...

References

History of County Durham History of Northumberland Lindisfarne {{England-hist-stub