838
| Years: 834 835 836 837 - 838 - 839 840 841 842 | |
| Decades: 800s 810s 820s - 830s - 840s 850s 860s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- At Hingston Down, Egbert of Wessex beats the Danish and the West Welsh.
- Fall of Amorium.
- Stone of Destiny placed at Scone Palace, Scotland.
- Rheine is founded.
- The Khazars convert to Judaism. (approximate date)