A by-election for the constituency of Edinburgh East in the United Kingdom House of Commons was held on 3 October 1945, caused by the ennoblement of the incumbent Labour MP Frederick Pethick-Lawrence. The result was a hold for the Labour Party, with their candidate George Thomson.
|Unionist||William Angus Sinclair||12,771||37.3|
- Craig, F. W. S. (1983) . British parliamentary election results 1918-1949 (3rd edition ed.). Chichester: Parliamentary Research Services. ISBN 0-900178-06-X.
- Leigh Rayment's Historical List of MPs
- A Guide to Post-War Scottish By-elections to the UK Parliament