Johannesburg
1,756 km²
Port Louis
136 km²
City Map Compare/Johannesburg vs Port Louisvs
vs
5 km
Johannesburg covers 1,756 km² of contiguous built-up land, 13× the built-up area of Port Louis (136 km²).
| Johannesburg | Port Louis | |
|---|---|---|
| Urban area | Johannesburg | Port Louis |
| Population (2025) | 8.59 million | 557,431 |
| Built-up area | 1,756 km² | 136 km² |
| Density | 4,893 /km² | 4,099 /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.