1440
| Years: 1437 1438 1439 - 1440 - 1441 1442 1443 | |
| Decades: 1410s 1420s 1430s - 1440s - 1450s 1460s 1470s | |
| Centuries: 14th century - 15th century - 16th century | |
Events
- Moctezuma I becomes Aztec ruler
- January 22 - Ivan III, grand duke of Moscow (+ 1505)