823
| Years: 819 820 821 822 - 823 - 824 825 826 827 | |
| Decades: 790s 800s 810s - 820s - 830s 840s 850s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- Crete is conquered from the Byzantines by the Saracens.
- Emperor Junna ascends to the throne of Japan.
- June 13: Charles the Bald, Frankish king and emperor