Sir John Popham (c. 1395 – c. 1463) was MP for Hampshire and Sheriff of Hampshire. He was a military commander and speaker-elect of the House of Commons. He took part in Henry V's invasion of France in 1415 and in the French wars under John of Lancaster, 1st Duke of Bedford. He was elected Speaker of the House of Commons in 1449 but was permitted by King Henry VI to decline the office on the ground of infirmity.