The 1917 Southampton by-election was a by-election held on 19 December 1917 for the UK House of Commons constituency of Southampton, a two-member seat.

Vacancy The election was caused by the appointment of one of the sitting Liberal MPs, William Dudley Ward as Vice-Chamberlain of the Household, one of the government whips. Under the Parliamentary rules of the day, Ward was obliged to resign his seat and fight a by-election.The Times, 10 December 1917 p9 The writ for the by-election was moved in Parliament on 10 December 1917.The Times, 11 December 1917 p10

Candidates The Liberals re-selected Ward. Being their partners in the coalition government of David Lloyd George, the Unionists were not expected to oppose Ward’s re-election but there was a possibility he would be challenged by a member of Southampton Town Council, Mr Tommy Lewis, the President of the British Seafarers' Union.The Times, 12 December 1917 p5 However, in the event no other candidates came forward to oppose Ward and he was returned unopposed.The Times House of Commons 1919; Politico’s Publishing 2004 p39

The result

See also List of United Kingdom by-elections (1900–1918)

References