Nairobi
598 km²
Zanzibar City
121 km²
City Map Compare/Nairobi vs Zanzibar Cityvs
vs
5 km
Nairobi covers 598 km² of contiguous built-up land, 4.9× the built-up area of Zanzibar City (121 km²).
| Nairobi | Zanzibar City | |
|---|---|---|
| Urban area | Nairobi | Zanzibar City |
| Population (2025) | 6.65 million | 1.03 million |
| Built-up area | 598 km² | 121 km² |
| Density | 11,114 /km² | 8,486 /km² |
Urban area = contiguous built-up land and the people living in it in 2025, drawn the same way for every city regardless of administrative boundaries. Source: GHSL Urban Centre Database R2024A, European Commission, Joint Research Centre (CC BY 4.0); some names adjusted to the city names people use, and country attribution follows the dataset.