William Cage (died 4 November 1645) was an English politician who sat in the House of Commons variously between 1614 and 1645.
He supported the Parliamentary side in the English Civil War.
Cage was the eldest son of Edward Cage of Ipswich (d. 1607) and his wife Beatrix (d. 1631), previously the wife of Thomas Wood.
Elected again in 1628, he held the seat until 1629 when King Charles decided to rule for eleven years without parliament.
[2] Cage had a country house at Burstall, Suffolk with an estate considered at about £300 per annum.