Ennis is a former 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.
This constituency was the parliamentary borough of Ennis in County Clare.
Notes:- Vesey-FitzGerald succeeded to the peerage, becoming 2nd Baron FitzGerald and Vesey and causing a by-election.
Fitzgerald resigned after being appointed a judge of the Queen's Bench, causing a by-election.