Castellanza
| Castellanza | |
|---|---|
| Comune di Castellanza | |
| Location of Castellanza | |
| Coordinates: 45°36′27″N 8°53′25″E / 45.60750°N 8.89028°E | |
| Country | Italy | 
| Region | Lombardy | 
| Province | Varese (VA) | 
| Frazioni | Castegnate, Buon Gesù | 
| Government | |
| • Mayor | Cristina Borroni (acting mayor since 26 April 2024) | 
| Area | |
|  • Total | 6 km2 (2 sq mi) | 
| Elevation | 216 m (709 ft) | 
| Highest elevation | 232 m (761 ft) | 
| Lowest elevation | 205 m (673 ft) | 
| Population  (01/01/2023) | |
|  • Total | 14,077 | 
| • Density | 2,300/km2 (6,100/sq mi) | 
| Demonym | Castellanzesi | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 21053 | 
| Dialing code | 0331 | 
| ISTAT code | 012042 | 
| Patron saint | San Giulio | 
| Saint day | 31 January | 
| Website | Official website | 
Castellanza is a town and comune located in the province of Varese, along the boundary of the province of Milan, in the Lombardy region of northern Italy.