Amsterdam
308 km²
Ruhr (Essen–Duisburg)
880 km²
308 km²
880 km²
Ruhr (Essen–Duisburg) covers 880 km² of contiguous built-up land, 2.9× the built-up area of Amsterdam (308 km²).
| Amsterdam | Ruhr (Essen–Duisburg) | |
|---|---|---|
| Urban area | Amsterdam | Ruhr (Essen–Duisburg) |
| Population (2025) | 1.22 million | 2.72 million |
| Built-up area | 308 km² | 880 km² |
| Density | 3,972 /km² | 3,090 /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.