802
| Years: 798 799 800 801 - 802 - 803 804 805 806 | |
| Decades: 770s 780s 790s - 800s - 810s 820s 830s | |
| Centuries: 8th century - 9th century - 10th century | |
Events
- 31 October - Irene deposed as Emperoress of Byzantium and replaced by Nicephorus I. She is banished to Lesbos.
- Jayavarman II declares the Khmer independent and establishes the kingdom of Angkor.
- Beginning of a "period of confusion" without a clear king in Bulgaria.
- Egbert becomes king of Wessex.
- Vikings sack Iona.
- Æthelmund, Earl of Hwicce (fallen in battle).