|667 by topic|
|Ab urbe condita||1420|
|Balinese saka calendar||588–589|
|Chinese calendar||丙寅年 (Fire Tiger)|
3363 or 3303
— to —
丁卯年 (Fire Rabbit)
3364 or 3304
|- Vikram Samvat||723–724|
|- Shaka Samvat||588–589|
|- Kali Yuga||3767–3768|
|Minguo calendar||1245 before ROC|
|Seleucid era||978/979 AG|
|Thai solar calendar||1209–1210|
793 or 412 or −360
— to —
794 or 413 or −359
Year 667 (DCLXVII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 667 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.
- Arab–Byzantine War: Caliph Muawiyah I launches a series of attacks against Byzantine holdings in Africa, Sicily and the East.
- The Lombards, under King Grimoald I, destroy Oderzo (Northern Italy). Much of its population flees to the nearby city of Heraclea.
- King Javanshir of Caucasian Albania (modern Azerbaijan) revolts against the Muslim-Arabs, but is defeated (approximate date).
- Wighard, archbishop of Canterbury, dies of the bubonic plague while returning from his consecration in Rome.
- The Abbey of St. Vaast in Arras (France) is founded.
- January 23 – Ildefonsus, bishop of Toledo
- Daoxuan, Chinese Buddhist monk (b. 596)
- Severus Sebokht, Syrian scholar and bishop
- Su Dingfang, general of the Tang Dynasty (b. 591)
- Wighard, archbishop of Canterbury (approximate date)