Barnsbury is an electoral ward in the London Borough of Islington.

The ward has existed since the creation of the borough on 1 April 1965 and was first used in the 1964 elections.

It returns three councillors to Islington London Borough Council.

[2] The by-election took place on 14 July 2016, following the resignation of James Murray.

[10] The by-election took place on 27 October 1983, following the resignation of Chris Smith.