| John Beaumont, 4th Baron Beaumont | |
| Offices: | Warden of the West Marches Admiral of the Northern Fleet Constable of Dover Castle Warden of the Cinque Ports Ambassador to France |
| Spouse: | Katherine Everingham, dau. of Sir Thomas Everingham, Knt. of Laxton, Nottinghamshire |
| Issue: | Henry Beaumont, 5th Baron Beaumont Richard Beaumont Sir Thomas Beaumont Eleanora Beaumont Elizabeth Beaumont, married William Botreaux, 3rd Baron Botreaux |
| Noble Family: | House of Beaumont |
| Father: | Henry Beaumont, 3rd Baron Beaumont |
| Mother: | Margaret de Vere, dau. of John de Vere, 7th Earl of Oxford |
| Birth Date: | c. 1361 |
| Birth Place: | Folkingham Castle, Lincolnshire |
| Death Date: | 9 September 1396 |
| Death Place: | Stirling, Scotland |
| Place Of Burial: | Sempringham Priory, Lincolnshire |
John Beaumont, 4th Baron Beaumont KG (1361–1396) was an English military commander and Admiral who served in the Hundred Years' War against the partisans of Antipope Clement VII.
Beaumont was born in 1361[1] at Folkingham Castle, Lincolnshire, the only son of Henry Beaumont, 3rd Baron Beaumont (1340–1369), by his wife Margaret, daughter of John de Vere, 7th Earl of Oxford, by his wife Maud de Badlesmere. His paternal grandparents were John Beaumont, 2nd Baron Beaumont (aft. 1317–1342) and Eleanor of Lancaster (1318–1372), the fifth daughter of Henry, 3rd Earl of Lancaster (c. 1281–1345).
He was knighted by King Edward III. He served in the French wars and against the partisans of Pope Clement VII. He accompanied John of Gaunt to Spain in the attempted conquest of Castile in 1386. He tilted against the Great Chamberlain of France in a tournament at Calais in 1388. In 1390 he tilted with the famous Boucicaut at St. Inghelbert. He was appointed Admiral of the North from 20 May 1388 – 22 June 1389 jointly with Sir John Roches. From 23 June 1389 until 22 March 1390, Admiral Lord Beaumont held the office solely. In 1389 he was briefly Warden of the West Marches towards Scotland. In 1392 he was appointed Constable of Dover Castle and Lord Warden of the Cinque Ports. In 1393 he was created a Knight of the Garter and was one of the Ambassadors to France to demand Princess Isabella in marriage for King Richard II.
In 1389 he married Katherine Everingham (1367–1426/8), daughter and heiress of Sir Thomas Everingham, Knt. of Laxton, Nottinghamshire.[2] They had the five children:[3]