The Whitby by-election was a Parliamentary by-election held on 1 June 1905. The constituency returned one Member of Parliament (MP) to the House of Commons of the United Kingdom, elected by the first past the post voting system.

Whitby was a parliamentary constituency centred on the town of Whitby in North Yorkshire. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom, elected by the first past the post system.