Treviglio is a town and comune in the province of Bergamo, in Lombardy, Northern Italy. It lies 20 kilometres south of the province capital, in the lower territory called "Bassa Bergamasca".
It's also part of the geographic area named "Gera d'Adda", included among the rivers Fosso Bergamasco to the North, Adda to the West and Serio to the East.
With approximately 30,000 inhabitants, the comune is now the second most populous town in the province.
It is rarely called "The tractor town" for the presence of the SAME Deutz-Fahr headquarters or seldom "The town of courtyards" for their preponderant presence in the Old Town.
It is subdivided in five main quartiers: Old town, West zone, North zone, the recent built East zone and the PIP. Northward lie four frazioni: Geromina, Castel Cerreto, Battaglie and Cascina Pezzoli; once the village of Castel Rozzone was also a frazione of Treviglio.