His Worship Sir John Prysot JP KS (died 1461) was an English justice.
[1] Records of his early life and career are sketchy, but from the late 1430s he was active in Cambridgeshire and Hertfordshire, starting as a Justice of the Peace in Cambridgeshire in 1437 followed by appointment as an Escheator for that county and for Huntingdonshire in 1438 and a second period of service as a justice of the peace in 1443, this time for Hertfordshire.
Between 1445 and 1447 he served as legal counsel for the Duchy of Lancaster, and in 1448 he was appointed an Assize Justice for Ely.
In the Parliaments of 1453 and 1455 he served as a Trier of Petitions from Gascony and other overseas territories.
In 1455 he also served on a Hertfordshire commission raising funds for the defence of Calais, and in 1459 he became a Feoffee for various estates belonging to the Duchy of Lancaster, and was also knighted.