Monarch of Castile and Leon: the rulers on the tree
20 holders of the title Monarch of Castile and Leon on the tree, 1230–1714, from Burgundy-Ivrea (7), Trastámara (7), Habsburg (Spain) (4), Habsburg (1), Bourbon (Spain) (1). The list is the one on this tree, not a complete one: some reigns are not recorded in Wikidata.
| 1230–1252 | Ferdinand III of Castille | Burgundy-Ivrea |
| 1252–1284 | Alfonso X of Castile and Leon | Burgundy-Ivrea |
| 1284–1295 | Sancho IV of León and Castile | Burgundy-Ivrea |
| 1295–1312 | Ferdinand IV of Castile | Burgundy-Ivrea |
| 1312–1350 | Alfonso XI of Castile and Leon | Burgundy-Ivrea |
| 1350–1369 | Peter of Castile | Burgundy-Ivrea |
| 1369–1379 | Henry II of Castile | Burgundy-Ivrea |
| 1379–1390 | John I of Castile and Leon | Trastámara |
| 1390–1407 | Enrique III of Castile | Trastámara |
| 1407–1454 | John II of Castile | Trastámara |
| 1454–1474 | Henry IV of Castile | Trastámara |
| 1465–1468 | Alfonso | Trastámara |
| 1474–1504 | Isabella I of Castile | Trastámara |
| 1504–1555 | Juana I of Castile | Trastámara |
| 1516–1556 | Charles V | Habsburg |
| 1556–1598 | Philip II of Spain | Habsburg (Spain) |
| 1598–1621 | Philip III of Spain | Habsburg (Spain) |
| 1621–1665 | Philip IV of Spain | Habsburg (Spain) |
| 1665–1700 | Charles II of Spain | Habsburg (Spain) |
| 1700–1714 | Philip V of Spain | Bourbon (Spain) |