St Johnstown (County Donegal) (Parliament of Ireland constituency)
| St Johnstown | |
|---|---|
| Former borough constituency for the Irish House of Commons | |
| County | County Donegal |
| Borough | St Johnston |
| –1801 | |
| Replaced by | Disfranchised |
St Johnstown was a borough constituency for St Johnston in County Donegal represented in the Irish House of Commons until 1800.