Rainham and Wennington is an electoral ward in the London Borough of Havering. The ward was first used in the 2002 elections. It returns three councillors to Havering London Borough Council. There was a revision of ward boundaries in 2022.
At the first five general borough elections the ward returned councillors standing as "Independent Residents Association" candidates who were not aligned with the Havering Residents Association council grouping that most residents association councillors in Havering have joined. By-elections in 2003 and 2004 were won by the Labour Party candidates but they did not retain their seats at the next election in 2006. The election in 2022 was won for the first time by three Conservative Party candidates. However, in the aftermath of the 2022 Wennington wildfire all three switched parties and joined the Havering Residents Association group on the council.
Councillors elected by party at each general borough election.
There was a revision of ward boundaries in Havering in 2022. The ward gained the Hornchurch Marshes and Frog Island area that was previously part of the South Hornchurch ward.
The election took place on 5 May 2022.
Following the 2022 Wennington wildfire, the three Conservative Party councillors for the ward switched to the Havering Residents Association.
There was a revision of ward boundaries in Havering in 2002.
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 by-election was held on 15 July 2004 following the resignation of Wayne Redgrave.
The by-election was held on 3 April 2003, following the resignation of Brian Clarke.
The election took place on 2 May 2002. As an experiment, it was a postal voting election, with the option to hand the papers in on election day.