County Londonderry (Parliament of Ireland constituency)
# County Londonderry (Parliament of Ireland constituency)

54°55′19″N 6°57′11″W﻿ / ﻿54.922°N 6.953°W﻿ / 54.922; -6.953

County Londonderry was a constituency represented in the Irish House of Commons until 1800.

## Members of Parliament

* 1613–1615: John Baker and John Rowley
* 1634–1635: Tristram Beresford and George Cary
* 1639–1649: Henry Conway and Edward Rowley
* 1656–1658 (Second Protectorate Parliament): Tristram Beresford and Thomas Newburgh
* 1661–1666: (Sir) Tristram Beresford and Sir John Rowley

### 1692–1801

| Election | First member | First party | | Second member | Second party |
| - | - | - | - | - | - |
| 1692 | Sir Tristram Beresford, 3rd Bt | | | George Philips | |
| 1697 | Sir Tristram Beresford, 3rd Bt | | | James Lenox | |
| 1697 | Sir Tristram Beresford, 3rd Bt | | | William Jackson | |
| 1703 | William Conolly | Whig | | Hercules Rowley | |
| 1729 | Arthur Dawson | | | Hercules Rowley | |
| 1742 | Edward Cary | | | Hercules Rowley | |
| 1743 | Edward Cary | | | Hercules Langford Rowley | |
| 1761 | Edward Cary | | | Thomas Conolly | |
| 1790 | Henry Beresford, Earl of Tyrone | | | Thomas Conolly | |
| 1800 | Henry Beresford, Earl of Tyrone | | | Hon. Charles William Stewart | |
| 1801 | Replaced by Westminster constituency of Londonderry County | Replaced by Westminster constituency of Londonderry County | Replaced by Westminster constituency of Londonderry County | Replaced by Westminster constituency of Londonderry County | Replaced by Westminster constituency of Londonderry County |
