County Londonderry (Parliament of Ireland constituency)

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