Costigliole d’Asti (Costiòle d’Ast in Piedmontese) is a small Italian town in the Province of Asti, southern Piedmont. It lies about 13 km south of the city of Asti in the Alto Monferrato, on the edge of the Langhe, in the alluvial plain of the river Tanaro southwards into the hills. . The name derives from the Latin Corte Costeliolae.
The neighbouring communes are Agliano Terme, Antignano, Calosso, Castagnole delle Lanze, Isola d’Asti, Montegrosso d’Asti, and San Martino Alfieri (in the Province of Asti); and Castiglione Tinella and Govone (in the Province of Cuneo).