This is a list of people who have served as custos rotulorum of Monmouthshire.
Richard Morgan bef. 1544–1556
Thomas Somerset bef. 1558 – aft. 1562
Rowland Morgan bef. 1564 – aft. 1577
William Herbert bef. 1584–1593
Henry Herbert, 2nd Earl of Pembroke bef. 1594–1601
Edward Somerset, 4th Earl of Worcester 1601–1628
William Herbert, 3rd Earl of Pembroke 1628–1630
Philip Herbert, 4th Earl of Pembroke 1630 – aft. 1636
Sir Nicholas Kemeys, 1st Baronet 1645–1646
English Interregnum
Henry Somerset, 1st Duke of Beaufort 1660–1689
Charles Gerard, 1st Earl of Macclesfield 1689–1694
Thomas Morgan 1695–1700
John Morgan 1701–1720
For later custodes rotulorum, see Lord Lieutenant of Monmouthshire.
