854
| Years: 850 851 852 853 - 854 - 855 856 857 858 | |
| Decades: 820s 830s 840s - 850s - 860s 870s 880s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Charles the Bald, Louis the German and Lothair meet at Attigny.
- Horik II succeeds Horik I as king of Denmark.
- Jayavarman III succeeds his father Jayavarman II as ruler of the Khmer Empire.