Terruggia ( Trugia Piedmontese ) is a municipality with 916 (as of 31 December 2012) inhabitants in the province of Alessandria (AL ), Region Piedmont.
The neighboring municipalities are Casale Monferrato and Rosignano Monferrato.
The village lies at an altitude of 199 m above sea level. The municipality covers an area of 7 km ².
In Terruggia vines of Barbera for the Barbera d'Asti, a DOCG red wine with status, as well as for the Barbera del Monferrato are grown.