Bosco Marengo (Italian: [ˈbosko maˈreŋɡo]; Piedmontese: Ël Bòsch [əl ˈbɔsk]) is a town and a comune (municipality) in the Province of Alessandria in the Italian region Piedmont, located about 80 kilometres (50 mi) southeast of Turin and about 12 kilometres (7 mi) southeast of Alessandria.

Bosco Marengo borders the following municipalities: Alessandria, Basaluzzo, Casal Cermelli, Fresonara, Frugarolo, Novi Ligure, Pozzolo Formigaro, Predosa, and Tortona.

There was a nuclear enrichment plant in Bosco Marengo, which started operating in 1973.

The site was handed to SOGIN, the Italian nuclear decommissioning authority in 2005 and, in December 2008, it was decided that it should be decommissioned.

This article on a location in the Province of Alessandria is a stub.