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

• Sir Edward Montagu bef. 1544–1557
• William Cecil, 1st Baron Burghley bef. 1564 – aft. 1584
• Thomas Cecil, 1st Earl of Exeter bef. 1594–1623
• Francis Manners, 6th Earl of Rutland 1623–1625
• Francis Fane, 1st Earl of Westmorland 1625–1629
• William Spencer, 2nd Baron Spencer 1629–1636
• Sir Christopher Hatton 1636–1646
• Interregnum
• Edward Montagu, 2nd Earl of Manchester 1660–1671
• James Compton, 3rd Earl of Northampton 1671–1681
• Christopher Hatton, 1st Viscount Hatton 1681–1689
• Charles Mordaunt, 1st Earl of Monmouth 1689
• Christopher Hatton, 1st Viscount Hatton 1689–1706
• vacant
• George Brudenell, 3rd Earl of Cardigan 1711–1714
• Charles Mordaunt, 3rd Earl of Peterborough 1714–1715
• Thomas Fane, 6th Earl of Westmorland 1715–1735
• John Montagu, 2nd Duke of Montagu 1735–1749

For later custodes rotulorum, see Lord Lieutenant of Northamptonshire.