|689 by topic|
|Ab urbe condita||1442|
|Balinese saka calendar||610–611|
|Chinese calendar||戊子年 (Earth Rat)|
3385 or 3325
— to —
己丑年 (Earth Ox)
3386 or 3326
|- Vikram Samvat||745–746|
|- Shaka Samvat||610–611|
|- Kali Yuga||3789–3790|
|Minguo calendar||1223 before ROC|
|Seleucid era||1000/1001 AG|
|Thai solar calendar||1231–1232|
815 or 434 or −338
— to —
816 or 435 or −337
Year 689 (DCLXXXIX) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 689 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.
- Byzantine–Bulgarian War: Emperor Justinian II defeats the Bulgars of Macedonia and recaptures Thessalonica, the second most important Byzantine city in Europe. He resettles the subdued Slavs in Anatolia (modern Turkey), where they are required to provide 30,000 men to the Byzantine army.
- Battle of Coronate: The Lombards under King Cunipert defeat the army of Duke Alahis, at the River Adda (Lombardy). He executes the rebel leaders; Alahis is captured and his head and legs are cut off. The southern Lombard duchies take advantage of Cunipert's distraction, and extend their territories.
- Battle of Dorestad: The Frisians under King Radbod are defeated by the Frankish mayor of the palace, Pippin of Herstal. The Rhine delta and Dorestad (modern Netherlands) become Frankish again, as well as the castles of Utrecht and Fechten (approximate date).
- The Asuka Kiyomihara Code, a collection of governing rules commenced in 681 under Emperor Tenmu, is promulgated in Japan.
- Cædwalla of Wessex arrives in Rome and is baptised by pope Sergius I, taking the name Peter. He dies 10 days later and is buried at St. Peter's Basilica.
- Prince Oswald, brother of King Osric of Hwicce, founds Pershore Abbey in Worcestershire (approximate date).
- April 20 – Cædwalla, king of Wessex
- July 8 – Kilian, Irish bishop (approximate date)
- May 10 – Kusakabe, Japanese prince (b. 662)
- September 10 – Guo Zhengyi, official of the Chinese Tang Dynasty
- Alahis, king (usurper) of the Lombards
- Colman, Irish missionary (approximate date)
- Grimoald II, duke of Benevento (Italy)
- John III, Coptic Orthodox pope of Alexandria
- Liu Jingxian, official of the Tang Dynasty
- Totnan, Irish Franconian apostle
- Ostrogorsky, pp. 116–122
- Hodgkin, Thomas (1895). "Italy and her Invaders", volume 6. Oxford
- Blok, D.P. (1968), "De Franken, hun optreden in het licht der historie", pp. 32–34