Antrim was a borough constituency which elected two MPs to the Irish House of Commons, the house of representatives of the Kingdom of Ireland.
In the Patriot Parliament of 1689 summoned by King James II, Antrim was not represented.
The constituency was disenfranchised on 31 December 1800 by the Acts of Union 1800.
The borough was represented in the House of Commons of the United Kingdom as part of the county constituency of Antrim.
The parliamentary representatives for all constituencies in the Irish House of Commons were elected using the bloc vote for two-member elections and first past the post for single-member by-elections.