Full, unbroken list of English monarchs (and Interregnum rulers) from 1066 onward. Amber rows have a direct, documented connection to Wallingford Castle; the rest are included for continuity only.
| Date in Power | Ruler | Reason for Leaving Post | Wallingford Link |
|---|---|---|---|
| 1066–1087 | William I (the Conqueror) | Died of illness following injuries from a fall from his horse. | Direct link |
| 1087–1100 | William II | Killed by an arrow in a hunting accident in the New Forest, in unclear circumstances. | No link |
| 1100–1135 | Henry I | Died naturally of illness. | No link |
| 1135–1154 | King Stephen | Died naturally; had already agreed under the Treaty of Wallingford (1153) that Henry would succeed him. | Direct link |
| 1141 (claimant) | Empress Matilda | Never crowned; ceded her claim to her son Henry under the Treaty of Wallingford and withdrew to Normandy. | Direct link |
| 1154–1189 | Henry II | Died naturally, after a long and largely stable reign. | Direct link |
| 1189–1199 | Richard I (the Lionheart) | Died of an infected crossbow wound sustained at the siege of Châlus-Chabrol in France. | No link |
| 1199–1216 | King John | Died of illness (dysentery) in 1216, during the First Barons' War. | Direct link |
| 1216–1272 | Henry III | Died naturally in old age. | Direct link |
| 1272–1307 | Edward I | Died naturally while on campaign against Scotland. | Direct link (imprisoned at Wallingford as Prince Edward, 1264) |
| 1307–1327 | Edward II | Deposed by Parliament following the 1326 invasion; imprisoned, and died (likely murdered) in custody in 1327. | Direct link |
| 1327–1330 (de facto) | Roger Mortimer, Earl of March | Overthrown in Edward III's coup at Nottingham Castle (1330); arrested and executed at Tyburn. | Direct link |
| 1327–1377 | Edward III | Died naturally in old age, having reclaimed personal power from Mortimer in 1330. | Direct link |
| 1377–1399 | Richard II | Deposed by Henry of Bolingbroke (Henry IV); died in captivity shortly after, likely starved or murdered. | No link |
| 1399–1413 | Henry IV | Died naturally of illness. | No link |
| 1413–1422 | Henry V | Died of dysentery while on campaign in France. | No link |
| 1422–1461 & 1470–1471 | Henry VI | Deposed twice during the Wars of the Roses; murdered in the Tower of London in 1471. | Direct link (tutored at Wallingford under Owen Tudor) |
| 1461–1470 & 1471–1483 | Edward IV | Died naturally of illness in 1483, having regained the throne during the Wars of the Roses. | No link |
| 1483 | Edward V | Deposed within months by his uncle Richard III; disappeared, presumed murdered (one of the "Princes in the Tower"). | No link |
| 1483–1485 | Richard III | Killed in battle at Bosworth Field, ending Plantagenet rule. | No link |
| 1485–1509 | Henry VII | Died naturally, having founded the Tudor dynasty. | No link |
| 1509–1547 | Henry VIII | Died naturally, having inherited Wallingford Castle as a young prince in 1502 but shown little interest in it. | Direct link |
| 1547–1553 | Edward VI | Died of illness (likely tuberculosis) as a teenager. | No link |
| 1553 (9 days) | Lady Jane Grey | Deposed almost immediately by Mary I; later executed. | No link |
| 1553–1558 | Mary I | Died naturally, after ordering lead stripped from Wallingford Castle for use at Windsor. | Direct link |
| 1558–1603 | Elizabeth I | Died naturally, ending the Tudor dynasty. | No link |
| 1603–1625 | James I | Died naturally of illness. | No link |
| 1625–1649 | Charles I | Deposed and executed by Parliament following the English Civil War. | Direct link |
| 1649–1653 | Commonwealth (no monarch) | Interregnum governed by the Rump Parliament and Council of State; ended when Cromwell dissolved Parliament. | No link |
| 1653–1658 | Oliver Cromwell (Lord Protector) | Died in office of natural causes; his Council of State had earlier ordered Wallingford Castle's demolition in 1652. | Direct link |
| 1658–1659 | Richard Cromwell (Lord Protector) | Resigned amid political collapse, unable to hold the Protectorate together after his father's death. | No link |
| 1660– | Charles II | Restored to the throne, ending the Interregnum (reign continued beyond this table's scope). | No link |