About Oio Region
Oio Region is a city located in Guinea-Bissau, in the Norte Province region. According to the latest available data (2026), the population of Oio Region is approximately 224,644 residents, making it the third largest city in Guinea-Bissau.
Globally, Oio Region ranks #8,021 among the world's most populated cities.
Oio Region City Statistics
| City | Oio Region |
| Country |  Guinea-Bissau |
| Population | 224,644 |
| Global Rank | #8,021 |
| Rank in Guinea-Bissau | #3 of 5 cities |
| City Category | city |
| Region | Norte Province |
| Latitude | 12.25 |
| Longitude | -15.25 |
| Data Year | 2026 |
Where is Oio Region Located?
Oio Region is located in Guinea-Bissau, in the Norte Province region, at coordinates 12.25° latitude and -15.25° longitude. Located near the equator, Oio Region experiences a tropical climate with warm temperatures throughout the year.
Nearby Cities
Other Cities in Guinea-Bissau
View all cities in Guinea-Bissau
Largest Cities in Guinea-Bissau
| # | City | Population |
|---|---|---|
| 1 | Bissau | 492,004 |
| 2 | Bafatá | 225,516 |
| 3 | Gabú Region | 214,520 |
| 4 | Cacheu Region | 192,508 |
Frequently Asked Questions
What is the population of Oio Region?
The population of Oio Region is approximately 224,644 residents according to the latest available data (2026).
Where is Oio Region located?
Oio Region is located in Guinea-Bissau at approximately 12.25° latitude and -15.25° longitude.
Is Oio Region one of the largest cities in Guinea-Bissau?
With a population of 224,644, Oio Region is one of the notable urban areas in Guinea-Bissau. It ranks #3 out of 5 cities in the country.
