10th century in Wales
|9th century | 11th century | Other years in Wales|
|Other events of the century|
- King Æthelstan of England asserts authority over the Welsh kings, and sets the border of Wales at the River Wye.
- Cadwallon ab Ieuaf becomes King of Gwynedd.
- Maredudd ab Owain becomes King of Deheubarth.
- date unknown - Llywelyn ap Seisyll, King of Gwynedd and Deheubarth (d. 1023)
- Cadell ap Rhodri, King of Seisyllwg
- Anarawd ap Rhodri, King of Gwynedd
- Idwal Foel, King of Gwynedd
- Hywel Dda, King of most of Wales
- Iago ab Idwal, King of Gwynedd
- Hywel ab Ieuaf, King of Gwynedd
- Cadwallon ab Ieuaf, King of Gwynedd
- Owain ap Hywel, King of Deheubarth