Castelnuovo Don Bosco, formerly Castelnuovo d'Asti is a comune in the province of Asti in the Italian region Piedmont, located about 20 kilometres east of Turin and about 25 kilometres northwest of Asti, on a hill near the confluence of the Nevissano and Bardella. Castelnuovo Don Bosco borders the following municipalities: Albugnano, Buttigliera d'Asti, Capriglio, Moncucco Torinese, Moriondo Torinese, Passerano Marmorito, and Pino d'Asti.