|Centuries:||6th century – 7th century – 8th century|
|Decades:||590s 600s 610s – 620s – 630s 640s 650s|
|Years:||622 623 624 – 625 – 626 627 628|
|625 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1378|
|Chinese calendar||甲申年 (Wood Monkey)
3321 or 3261
— to —
乙酉年 (Wood Rooster)
3322 or 3262
|- Vikram Samvat||681–682|
|- Shaka Samvat||547–548|
|- Kali Yuga||3726–3727|
|Minguo calendar||1287 before ROC
|Seleucid era||936/937 AG|
|Thai solar calendar||1167–1168|
Year 625 (DCXXV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 625 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–Sassanid War: Emperor Heraclius marched with his forces west through the mountains of Corduene. In less than seven days, he bypasses Mount Ararat and captures along the Arsanias River the strategic fortresses Amida and Martyropolis on the upper Tigris. The Persian army in northern Mesopotamia withdraw westward across the Euphrates. Heraclius pursues into Cilicia, accompanied by a great train of booty.
- Battle of Sarus: Heraclius is victorious in a Byzantine assault rivier crossing. The reinforced Persians under Shahrbaraz are defeated along the Sarus River near Adana (modern Turkey). He recaptures Cappadocia and Pontus, and returns to Trapezus to spend the winter. Shahrbaraz retreats in good order, and is able to continue his advance through Asia Minor towards Constantinople.
- King Edwin of Northumbria marries Æthelburga of Kent. As a Christian, she brings her personal chaplain, Paulinus, and encourages her husband to convert to Christianity.
- King Cadfan of Gwynedd (Wales) dies and is buried at Llangadwaladr where his memorial stone can still be seen. He is succeeded by his son Cadwallon (approximate date).
- Judicaël becomes high king of Domnonée (northern Brittany).
- King Pulakeshin II of Chalukya receives Persian envoys who are sent by king Khosrau II at Badami (southern India).
- March 19 – Battle of Uhud: Muhammad retreats against the inhabitants of Mecca (Saudi Arabia), which they consider a victory.
- October 25 – Pope Boniface V dies at Rome after a 6-year reign. He is succeeded by Honorius I as the 70th pope.
- Hasan ibn Ali, grandson of Muhammad (d. 670)
- Œthelwald, king of Deira (approximate date)
- Theodo II, duke of Bavaria (approximate date)
- Wu Zetian, empress of the Zhou Dynasty (d. 705)
- Zhang Jianzhi, official of the Tang Dynasty (d. 706)