The 2021 Airdrie and Shotts by-election was held in the UK parliament constituency of Airdrie and Shotts following the resignation of the sitting member (MP), Neil Gray, to run for the corresponding seat (which he subsequently won) in the 2021 Scottish Parliament election. This was necessitated by Scottish National Party (SNP) rules banning its members from sitting as an MSP and an MP at the same time. It took place on 13 May 2021, a week after the Scottish Parliament elections, to reduce COVID-19 transmission risk.