Rainham was an electoral ward in the London Borough of Havering from 1965 to 2002.
It returned councillors to Havering London Borough Council.
[4] The by-election took place on 20 April 1989, following the resignations of Mary Ball and Laraine Saunders.
[5] The by-election took place on 26 September 1985, following the resignation of Paul Long.
[5] The by-election took place on 14 April 1983. following the death of Mary Davies.