Sir John Oldcastle was an English Lollard leader. From 1409 to 1413, he was summoned to parliament as Baron Cobham, in the right of his wife.
- Occupation
- politician
- Position held
- Member of the October 1404 Parliament, Member of the January 1404 Parliament, High Sheriff of Herefordshire
- Citizenship
- Kingdom of England
- Born
- 1378
- Died
- December 14, 1417