Helsinki
381 km²
Saint Petersburg
550 km²
City Map Compare/Helsinki vs Saint Petersburgvs
vs
2 km
Saint Petersburg covers 550 km² of contiguous built-up land, 1.4× the built-up area of Helsinki (381 km²).
| Helsinki | Saint Petersburg | |
|---|---|---|
| Urban area | Helsinki | Saint Petersburg |
| Population (2025) | 1.00 million | 4.88 million |
| Built-up area | 381 km² | 550 km² |
| Density | 2,628 /km² | 8,871 /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.