Population in Onsala compared to Siena
Onsala: 12.415 (2020)
Siena: 52.991 (2025)
In Onsala the population is about 23% of the population of Siena.
Size of Onsala compared to Siena
Onsala: ca. 11 km²
Siena: ca. 119 km²
Onsala has a land area approximately 91% smaller than Siena
Population density of Onsala compared to Siena
Onsala: ca. 1.135 Einwohner/km²
Siena: ca. 447 Einwohner/km²
The population density of Onsala is about2.5 times higher, than the one of Siena.
City comparison between Onsala and other cities
more about Onsala (Halland County, Sweden)
more about Siena (Tuscany, Italy)