Simon of Pattishall (or Pateshull) (died 1217) was an English judge and civil servant who is considered the first Chief Justice of the Common Pleas.
He entered the administration in 1193, most likely thanks to his association with Geoffrey Fitz Peter, and was appointed High Sheriff of Essex and Hertfordshire, a position he held until 1194.
In 1213 he was a commissioner assessing damage done to churches in the Diocese of Canterbury following the 1208 Interdict, which was lifted after John submitted to Pope Innocent III.
His special position is also confirmed by the fact that, among the plea rolls produced by the clerks of the various justices, it was those of Pattishall that were considered authoritative, and preserved for future reference.
John was persuaded to relax his restrictions by the Abbot of Woburn, and Pattishall recovered his property by the end of 1215, beginning judicial work again in 1216.