John Keppock (died 1404) was an Irish judge of the late fourteenth century, who held the offices of Lord Chief Justice of Ireland, Chief Baron of the Irish Exchequer, and Deputy Lord Chancellor of Ireland.
The Keppock (or Cappock) family settled in Louth shortly after the Norman Conquest of Ireland and were closely associated with the town of Ardee.
[3] In 1370, he stepped down as Lord Chief Justice in favour of William de Skipwith, but remained a judge of the Bench.
Following the death of the Lord Lieutenant of Ireland Edmund Mortimer, 3rd Earl of March in 1381, Keppock was among the senior judges summoning the temporal and spiritual peers to inform them of the Earl's death and appoint a Lord Deputy to replace him.
This inquiry confirmed that he had not received full payment in four years, leading to an order for his complete remuneration.