St Helier is an electoral ward in the London Borough of Merton. The ward was first used in the 1978 elections. It returns councillors to Merton London Borough Council.
There was a revision of ward boundaries in Merton in 2022.
The by-election on 4 July 2024 took place on the same day as the United Kingdom general election. It followed the resignation of Helena Dollimore.
The election took place on 5 May 2022.
The by-election took place on 6 May 2021, following the resignation of Kelly Braund. It was held on the same day as the 2021 London mayoral election and 2021 London Assembly election.
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.
The election took place on 7 May 1998.
The election took place on 5 May 1994.
The election took place on 3 May 1990.
The election took place on 8 May 1986.
The election took place on 6 May 1982.
The election took place on 4 May 1978.