Austin
628 km²
San Antonio
640 km²
City Map Compare/Austin vs San Antoniovs
vs
5 km
San Antonio covers 640 km² of contiguous built-up land, about the same built-up area as Austin (628 km²).
| Austin | San Antonio | |
|---|---|---|
| Urban area | Austin | San Antonio |
| Population (2025) | 1.58 million | 1.51 million |
| Built-up area | 628 km² | 640 km² |
| Density | 2,516 /km² | 2,365 /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.