| Londonderry County | |
|---|---|
| Former County constituency for the Irish House of Commons |
|
| Former constituency | |
| Created | |
| Abolished | 1800 |
| Replaced by | Londonderry County |
Coordinates: 54°55′19″N 6°57′11″W / 54.922°N 6.953°W
Londonderry County was a constituency represented in the Irish House of Commons until 1800.