Cannon Hill is an electoral ward in the London Borough of Merton. The ward was first used in the 1964 elections and elects three councillors to Merton London Borough Council.
There was a revision of ward boundaries in Merton in 2022.
Jennifer Gould resigned in January 2026, with the by-election deferred until May 2026.
The election took place on 5 May 2022.
There was a revision of ward boundaries in Merton in 2002.
The by-election took place on 20 June 2019, following the resignation of Mark Kenny.
The election took place on 3 May 2018.
The election took place on 22 May 2014.
The election on 6 May 2010 took place on the same day as the United Kingdom general election.
The election took place on 4 May 2006.
The election took place on 2 May 2002.
There was a revision of ward boundaries in Merton in 1978. The number of councillors returned was reduced from four to three.
The election on 7 May 1998 took place on the same day as the 1998 Greater London Authority referendum.
The election took place on 5 May 1994.
The election took place on 3 May 1990.
The by-election took place on 26 November 1987, following the resignation of David Williams.
The election took place on 8 May 1986.
The election took place on 6 May 1982.
The election took place on 4 May 1978.
The by-election took place on 30 October 1975.
The election took place on 2 May 1974.
The election took place on 13 May 1971.
The election took place on 9 May 1968.
The election took place on 7 May 1964.