This is a list of people who have served as Custos Rotulorum of Merionethshire.
John "Wynn" ap Maredudd 1543 – bef. 1558
Lewis ap Owen 1553–1555
Ellis Price bef. 1558 – bef. 1562
Owen ap John ap Howell Vaughan bef. 1562 – bef. 1564
Ellis Price bef. 1564 – aft.1577
Robert Dudley, 1st Earl of Leicester bef. 1579 –1588
Sir Robert Salusbury bef. 1594–1599
Sir Thomas Myddelton bef. 1599 –1617
William Salusbury 1617 – aft. 1626
Hugh Nanney 1629–1646
Interregnum
Sir Thomas Myddelton, 1st Baronet 1660–1663
Sir John Owen 1663–1666
William Owen 1666–1678
Sir John Wynn, 5th Baronet 1678–1688
William Herbert, 1st Marquess of Powis 1688–1689
Sir William Williams, 1st Baronet 1689–1690
Sir John Wynn, 5th Baronet 1690–1711
Edward Vaughan 1711– (died 1718)
Lewis Owen 1722–1731
William Vaughan 1731–1769
Wilmot Vaughan, 1st Earl of Lisburne 1769–1775
For later custodes rotulorum, see Lord Lieutenant of Merionethshire.
