John Cobham (died 12 November 1399) was an English politician.
Cobham was the son of John Cobham of Hever, Kent. His brother, Thomas Cobham, was also an MP for Kent. He married three times. Before 1363, he married Juliana, a widow from Sittingbourne, Kent. Around 1375, he married Joan d’Oyley from Staffordshire, also a widow. At some point before June 1398, he married a woman named Margaret.
Cobham was Member of Parliament for Sussex 1378 and 1385, Surrey January 1380, April 1384, November 1384 and Kent January 1390, 1394 and September 1397. He was considered a loyal adherent to Richard II of England.