John de Grey, 1st Baron Grey de Rotherfield KG (9 October 1300[1] – September 1359[1]) was an English soldier and courtier.

[2] John de Grey of Rotherfield was a founding member of the Most Noble Order of the Garter.

[3] By December 1349,[1] John was Lord Steward of the Royal Household of King Edward III.

He was summoned to parliament often from 1338 to 1357, and is regarded as having thus become Baron Grey of Rotherfield.

[1][2] He married firstly, shortly before 1313,[1] Katherine Fitzalan, daughter and coheir of Bryan FitzAlan, Lord FitzAlan of Bedale, brother-in-law to King John of Scotland, Yorkshire and had a single son and heir:[2] He married secondly Avice, daughter of John Marmion, Baron of Winteringham.