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The 1921 Westminster Abbey by-election was a parliamentary by-election held on 25 August 1921 for the British House of Commons constituency of Westminster Abbey in London. The seat had become vacant when the Conservative Member of Parliament (MP) William Burdett-Coutts had died on 28 July 1921. Burdett-Coutts had held the seat since it had been created for the 1918 general election, when he had been returned unopposed.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| C | Unionist | William Burdett-Coutts | Unopposed | ||
| Unionist hold | |||||
| C indicates candidate endorsed by the coalition government. | |||||