| Portarlington | |
|---|---|
| Former borough constituency for the House of Commons | |
| County | Queen's County |
| Borough | Portarlington |
| 1801–1885 | |
| Seats | 1 |
| Created from | Portarlington (IHC) |
| Replaced by | |
Portarlington was a rotten borough and 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.