Maryborough (Parliament of Ireland constituency)

Maryborough was a constituency represented in the Irish House of Commons until 1800. The town is known as Portlaoise since 1929.

Members of Parliament

 * 1585 Robert Gale, Thomas Lambyne and George Harvey
 * 1613–1615 Sir Adam Loftus and Alexander Barrington
 * 1634–1635 Sir Walter Crosbie, 1st Baronet and Sir William Gilbert
 * 1639–1649 Sir Nicholas White (died and replaced 1644 by Henry Gilbert) and Sir William Gilbert
 * 1661–1666 John Gilbert and George St George (sat for Leitrim and replaced 1661 by Alexander Pigott)