Cittiglio is a comune (municipality) in the Province of Varese in the Italian region Lombardy, located about northwest of Milan and about northwest of Varese. As of 31 December 2004, it had a population of 3,817 and an area of . The town is known as the birthplace of Alfredo Binda, a world-class bicycle racer in the 1920s and 1930s.
Cittiglio borders the following municipalities: Brenta, Caravate, Castelveccana, Gemonio, Laveno-Mombello.
The elite women's professional road bicycle racing event Trofeo Alfredo Binda-Comune di Cittiglio is held annually here.
Cittiglio is twinned with: