East Tyrone by election, 1918

The East Tyrone by-election of 1918 was held on 3 April 1918. The by-election was held due to the resignation of the incumbent Irish Parliamentary Party MP, William Redmond. It was won by the Irish Parliamentary candidate Thomas Harbison.

Redmond had resigned in order to contest the Waterford by-election which had become vacant when his father, John Redmond, had died. The Sinn Féin candidate Vincent White had previously stood against Redmond in Waterford. The by-election was the last in a short string of by-elections where it seemed that the more moderate nationalists were regaining ground from Sinn Féin before being virtually wiped out in the 1918 general election in Ireland.