Drogheda was a parliamentary borough constituency in Ireland, which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom.
It was an original constituency represented in Parliament when the Union of Great Britain and Ireland took effect on 1 January 1801, replacing the Drogheda constituency in the Irish House of Commons.
This constituency was the parliamentary borough of Drogheda in County Louth.
On petition, O'Dwyer was unseated for "want of qualification", causing a by-election.
[10] Although this was later not shown to have affected the result significantly, on petition, Whitworth was unseated for separate findings of an "organised system of intimidation and force was established by Mr. Whitworth and his friends and agents.