John de Ros, 7th Baron de Ros of Helmsley (c.1397 – 22 March 1421) was an English nobleman. He was the eldest son of William de Ros, 6th Baron de Ros, and Margaret Fitzalan (d. 3 July 1438), the daughter of John FitzAlan, 1st Baron Arundel, by Eleanor Maltravers (d. 3 July 1438), younger daughter and coheir of Sir John Maltravers.