Reggio nell'Emilia, usually referred to as Reggio Emilia, or simply Reggio by its inhabitants, and known until 1861 as Reggio di Lombardia, is a …Reggio nell'Emilia, usually referred to as Reggio Emilia, or simply Reggio by its inhabitants, and known until 1861 as Reggio di Lombardia, is a city in northern Italy, in the Emilia-Romagna region. It has about 171,944 inhabitants and is the main comune of the province of Reggio Emilia.