Henry Popham (c.1399 – 17 June 1418) was an English landowner and Member of Parliament.
He was born a younger son of Sir John Popham of Popham, Hampshire whom he eventually succeeded to the Manor of Buckland.
He served on a number of local commissions and was appointed High Sheriff of Hampshire for 1388-89.
He was elected Member of Parliament seven times for Hampshire (in 1383, 1385, 1388 (twice), 1390, 1394 and 1404).
He died in 1418 and was buried in St. Thomas’s church in Lymington. He had married twice; firstly Joan Devonshire, with whom he had a son, Sir Stephen Popham and secondly Margaret, the sister of Robert James of Boarstall, Buckinghamshire and the widow of Richard Mewys of Long Barnes, Essex, with whom he had a further 2 sons.