John de Burgh (English: /dəˈbɜːr/ də-BUR; 1286 – 18 June 1313) was an Irish noble who was the son of Richard Óg de Burgh, 2nd Earl of Ulster and his mother was, Margarite.

Heir apparent to the Earldom of Ulster, he married (as her first husband) in Waltham Abbey, Essex, on 30 September 1308, Elizabeth de Clare, sister of Gilbert de Clare, 7th Earl of Hertford and 8th Earl of Gloucester.

She was the founder of Clare College, Cambridge, and a granddaughter of King Edward I of England.

Gloucester in turn married John's sister Maud.

John and Elizabeth had one son: However, John died in Galway the next year, leaving his infant son William heir to the Earldom.