Thomas de Ros, 4th Baron de Ros, English politician (b. 1338)
Thomas Ros, 4th Baron Ros of Helmsley (13 January 1335 – 8 June 1384) was the son of William Ros, 2nd Baron Ros and Margery de Badlesmere.

In 1364, he accompanied the king of Cyprus to the Holy Land; and was in the French wars, from 1369 to 1371. He was summoned to parliament by both King Edward III of England and King Richard II of England. He died at Uffington, Lincolnshire, 8 June 1384, and was buried at Rievaulx Abbey. His widow became the wife of Sir Richard Burley.