This is a list of people who have served as Custos Rotulorum of Westmorland.

• Ambrose Middleton bef. 1544 – aft. 1547
• Alan Bellingham bef. 1558–1578
• Sir Thomas Boynton bef. 1579–1582
• Robert Bragge 1582–1584
• Sir Thomas Strickland 1584–1612
• Henry Clifford, 1st Baron Clifford 1621–1641
• Sir Philip Musgrave, 2nd Baronet 1641–1646
• Interregnum
• Sir Philip Musgrave, 2nd Baronet 1660–1678
• John Lowther, 1st Viscount Lonsdale 1678–1700
• Thomas Wharton, 5th Baron Wharton 1700–1702
• Thomas Tufton, 6th Earl of Thanet 1702–1706
• Thomas Wharton, 1st Earl of Wharton 1706–1714
• Thomas Tufton, 6th Earl of Thanet 1714
• Thomas Wharton, 1st Marquess of Wharton 1714–1715
• Henry Lowther, 3rd Viscount Lonsdale 1715–1751

For later custodes rotulorum, see Lord Lieutenant of Westmorland.