Treviglio is a town and comune located in the Province of Bergamo within the Lombardy region of Italy. It is situated in the heart of the Po Valley, positioned approximately 22 km (14 mi) south of the provincial capital, Bergamo.
With a population of 31,604, Treviglio serves as the second-largest comune in the province. The municipality is characterized by its geographical location within the central Italian plains and its administrative significance in the Bergamo area.