John de Beaumont, 2nd Baron Beaumont

John de Beaumont (1318–1342), second Baron Beaumont, was the son of Henry de Beaumont and Alice Comyn, heiress of Buchan. His family was the English branch of the French house of Brienne. Where his father had claimed the Scottish earldom of Buchan through his wife, John never used the title.

His marriage tied him to the house of Lancaster: on 6 November 1330 he married Eleanor of Lancaster, sister of Henry of Grosmont. In 1338 John and Eleanor, a lady-in-waiting to Queen Philippa, accompanied the queen to Ghent, where his son Henry was born in 1340.

After his father's death in 1340 he returned to England and took his seat in parliament. He died on 14 April 1342 of wounds from a tournament, leaving the infant Henry as baron.