|Centuries:||7th century – 8th century – 9th century|
|Decades:||740s 750s 760s – 770s – 780s 790s 800s|
|Years:||767 768 769 – 770 – 771 772 773|
|770 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1523|
|Bahá'í calendar||−1074 – −1073|
|English Regnal year||N/A|
|Chinese calendar||己酉年 (Earth Rooster)
3466 or 3406
— to —
庚戌年 (Metal Dog)
3467 or 3407
|- Vikram Samvat||826–827|
|- Shaka Samvat||692–693|
|- Kali Yuga||3871–3872|
|Igbo calendar||−230 – −229|
|Japanese calendar||Jingo-keiun 4 / Hōki 1
|Minguo calendar||1142 before ROC
|Thai solar calendar||1313|
|Wikimedia Commons has media related to 770.|
Year 770 (DCCLXX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 770 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- King Charlemagne signs a peace treaty with duke Tassilo III of Bavaria and marries the Lombard princess Desiderata (daughter of king Desiderius). He travels to the Lombard court at Pavia to concludes arrangements, pope Stephen III opposes the marriage and protesting about a Frankish-Lombard alliance.
- Hedeby, an important trading settlement, in the Danish-northern German borderland is founded (approximate date).
- King Alhred of Northumbria takes an interest in continental missionary activities and sends Willehad to Frisia in modern-day Netherlands (approximate date).
- Caliph Al-Mansur orders to close the Canal of the Pharaohs (Egypt). The only available land routes to transship camel caravans' goods are from Alexandria to ports on the Red sea or the northern Byzantine Silk Road.
- August 28 – Empress Kōken (also Shōtoku) of Japan dies and is succeeded by her cousin Kōnin, who is the grandson of the late emperor Tenji.
- Ansegisus, Frankisch abbot (approximate date)
- Michael II, emperor of the Byzantine Empire (d. 829)
- Pepin of Italy, son of Charlemagne (or 773)
- Cennselach mac Brain, king of the Uí Ceinnselaig (Ireland)
- Du Fu, Chinese poet (b. 712)
- August 28 – Kōken, empress of Japan (b. 718)
- Ma'n ibn Za'ida al-Shaybani, Arab general (or 769)
- Modestus, Irish missionary (approximate date)
- Opportuna of Montreuil, Frankish abbess
- Tóim Snáma mac Flainn, king of Osraige (Ireland)
- McKitterick, Rosamond, Charlemagne: The Formation of a European Identity (2008), p. 84