30th century BC
(31st century BC - 30th century BC - 29th century BC - other centuries)(4th millennium BC - 3rd millennium BC - 2nd millennium BC)
Events:
- 2925 - 2776 BC - First Dynasty wars in Egypt
- 2900 BC - Beginning of the Early Dynastic Period I in Mesopotamia.
- The shekal was introduced in Mesopotamia as a monetary and weight unit, see Historical weights and measures.