The London Borough of Islington is a London borough in Inner London with an estimated population of 215,667. It was formed in 1965 by merging the former metropolitan boroughs of Islington and Finsbury, but the merged entity remains the second smallest borough in London and the third smallest district in England. The borough contains two Westminster parliamentary constituencies, Islington North and Islington South & Finsbury. The local authority is Islington Council.
Islington was originally named by the Saxons Giseldone (1005), then Gislandune (1062). The name means 'Gīsla's hill' from the Old English personal name Gīsla and dun 'hill', 'down'. The name then later mutated to Isledon, which remained in use well into the 17th century when the modern form arose. In medieval times, Islington was just one of many small manors in the area, along with Bernersbury, Neweton Berewe or Hey-Bury, and Canonesbury (Barnsbury, Highbury and Canonbury - names first recorded in the 13th and 14th centuries). "Islington" came to be applied as the name for the parish covering these villages, and was the name chosen for the Metropolitan Borough of Islington, on its formation in 1899. On the merger with Finsbury, to form the modern borough this name came to be applied to the whole borough.