Southwark South East by election, 1921

The Southwark South East by-election, 1921 was a parliamentary by-election held on 14 December 1921 for the British House of Commons constituency of Southwark South East, in the Metropolitan Borough of Southwark in London.

The seat had become vacant on the death of the constituency's Coalition Liberal Member of Parliament (MP), James Arthur Dawes. Dawes had been MP for Southwark South East since the 1918 election, and before that Walworth since the January 1910 election.