Dungannon was a United Kingdom Parliament constituency, in Ireland, returning one MP. It was an original constituency represented in Parliament when the Union of Great Britain and Ireland took effect on 1 January 1801 and was abolished by the Redistribution of Seats Act 1885. This act split County Tyrone into four single-member constituencies: East Tyrone, Mid Tyrone, North Tyrone and South Tyrone. It took effect at the 1885 United Kingdom general election.

Boundaries

This constituency was the parliamentary borough of Dungannon in County Tyrone.

Members of Parliament

Elections

Elections in the 1830s

Knox resigned, causing a by-election. Knox resigned, causing a by-election.

Elections in the 1840s

Elections in the 1850s

Knox resigned due to ill health by accepting the office of Steward of the Chiltern Hundreds, causing a by-election. Knox resigned again by accepting the office of Steward of the Chiltern Hundreds, causing a by-election. Knox was appointed a Groom in Waiting to Queen Victoria, causing a by-election.

Elections in the 1860s

Elections in the 1870s

Elections in the 1880s

On petition, Dickson was unseated and a by-election was called.