1908 St Austell by-election

{{Short description|UK Parliamentary by-election}}

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The 1908 St Austell by-election was held on 5 February 1908. The by-election was held due to the resignation of the incumbent Liberal MP, William Alexander McArthur. It was won by the Liberal candidate Thomas Agar-Robartes,{{Rayment-hc|date=May 2021}} who was unopposed.