Shanghai
3,128 km²
Yancheng
223 km²
City Map Compare/Shanghai vs Yanchengvs
vs
5 km
Shanghai covers 3,128 km² of contiguous built-up land, 14× the built-up area of Yancheng (223 km²).
| Shanghai | Yancheng | |
|---|---|---|
| Urban area | Shanghai | Yancheng |
| Population (2025) | 30.7 million | 1.21 million |
| Built-up area | 3,128 km² | 223 km² |
| Density | 9,808 /km² | 5,433 /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.