| St Johnstown | |
|---|---|
| Former borough constituency for the Irish House of Commons | |
| County | County Longford |
| Borough | Ballinalee |
| ?–1801 | |
| Replaced by | Disfranchised |
St Johnstown was a borough constituency for Ballinalee or Saintjohnstown County Longford represented in the Irish House of Commons until 1800.