2019 Peterborough by-election
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| Peterborough constituency | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Turnout | 48.43% | ||||||||||||||||||||||||||||||||||||||||||||||||||||
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A by-election took place in the Parliamentary constituency of Peterborough on 6 June 2019. It was won by Lisa Forbes of the Labour Party. Mike Greene of the Brexit Party took second place.
The seat was vacant following the removal of the former Labour MP Fiona Onasanya by means of a recall petition triggered by her conviction for perverting the course of justice.