|Comune di Siziano|
|Frazioni||Bonate, Campomorto, Casatico, Gnignano|
|• Mayor||Massimiliano Brambilla|
|• Total||11.8 km2 (4.6 sq mi)|
|Population (December 2004)|
|• Density||470/km2 (1,200/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
|Patron saint||St. Bartholomew|
|Saint day||September 9|
At Siziano, there is a large mediumwave transmitter, which broadcasts Rai Radio 1 on 900 kHz with 600 kW. It is one of the most powerful transmitters in Italy and can be received in whole Europe at night time. As antenna two guyed mast radiators insulated against ground are used. They are 148 and 145 metres tall and situated at 45°19'54"N 9°11'59"E respectively 45°19'41"N 9°11'50"E.
- All demographics and other statistics: Italian statistical institute Istat.