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.

Ernest William Beckett, 2nd Baron Grimthorpe, was a British banker and Conservative politician who sat in the House of Commons from 1885 until 1905 when he inherited the Grimthorpe peerage.