On 27 March 1784, he was appointed Master of the Rolls, a job to which he dedicated himself once he ceased to act as an MP. He had previously practised in the Court of Chancery, and although unfamiliar with Roman law was highly efficient; Lord Eldon said "I am mistaken if, after I am gone, the Chancery Records do not prove that if I have decided more than any of my predecessors in the same period of time, Sir Lloyd Kenyon beat us all". On 9 June 1788, Kenyon succeeded Lord Mansfield as Lord Chief Justice, and was granted a barony. Although not rated as highly as his predecessor, his work "restored the simplicity and rigor of the common law". He remained Lord Chief Justice until his death in 1802.