Oioball is a regionball of 
Guinea-Bissauball.
History
Oioball was firstly colonized by 
Kingdom of Portugalball and later adopted by 
Portuguese Guineaball and then Guinea-Bissauball.
| The Republic of
| |
| Regions |
.png){kind=icon} Bafatáball • Biomboball •  Bissauball • Bolamaball • Cacheuball • Gabúball • Oioball • Quinaraball • Tombalíball
|
|---|---|
| Historical entities |  Migrants from East •  Mali Empireball •  Kaabu Empireball •  Portuguese Guineaball
|