Petts Wood and Knoll is an electoral ward in the London Borough of Bromley. The ward was first used in the 1978 elections and elects three councillors to Bromley London Borough Council.
There was a revision of ward boundaries in Bromley in 2022.
Keith Onslow died in December 2025, with the by-election deferred until May 2026.
The election took place on 5 May 2022.
There was a revision of ward boundaries in Bromley 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 election took place on 2 May 2002.
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 6 April 1989, following the resignation of Michael Edwards.
The election took place on 8 May 1986.
The election took place on 6 May 1982.
The by-election took place on 30 October 1980, following the death of Don Adams.
The by-election took place on 19 June 1980, following the resignation of Alan Cornish.
The election took place on 4 May 1978.