Portrait of Oliver Cromwell is a c.1649 portrait painting by the English artist Robert Walker, depicting the politician and general Oliver Cromwell.

Cromwell was a Parliamentarian commander during the English Civil War and in 1653 he became head of state as Lord Protector of the Commonwealth.

[1] It has drawn comparison to Anthony van Dyck's 1636 depiction of the Royalist Earl of Strafford.

[2] Cromwell is shown at three-quarters length wearing a full suit of armour, although during the Civil War only the cuirass was usually worn.

[3] The work was likely produced the same year Cromwell sat as one of the judges at the Trial of Charles I leading to his execution on 30 January.