Lagos
1,199 km²
Onitsha region
1,090 km²
City Map Compare/Lagos vs Onitsha regionvs
vs
5 km
Lagos covers 1,199 km² of contiguous built-up land, 1.1× the built-up area of Onitsha region (1,090 km²).
| Lagos | Onitsha region | |
|---|---|---|
| Urban area | Lagos | Onitsha region |
| Population (2025) | 12.8 million | 5.79 million |
| Built-up area | 1,199 km² | 1,090 km² |
| Density | 10,714 /km² | 5,310 /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.
“Region” marks urban areas that join many towns and dense rural settlement into one built-up area; they are named after their main town.