thumb|200px|Arms of Sir Reynold Cobham, 1st Baron Cobham of Sterborough, KG
thumb|Reynold Cobham tomb, Lingfield church
Reynold (or Reginald) Cobham, 1st Baron Cobham of Sterborough KG (c.1295–1361) was a medieval English knight and diplomat.
Life
He was the son of Sir Reynold Cobham by Joan, the daughter and heir of William de Evere. This Reynold was the second son of John de Cobham, by his first wife Joan the daughter of William Fitzbenedict. The family were based at Sterborough Castle, Lingfield, Surrey.
In his early life he was employed on diplomatic missions. By 1334 he was a knight in the household of King Edward III and fought in the Scottish campaign against David de Bruce and then on the continent in the Low Countries and Brittany. During the Siege of Tournai (1340) he held the office of "marshal of the army", a role specific to a particular army and distinct from the hereditary position of Lord Marshal of England.