Gastrotheca antomia is a species of frog in the family Hemiphractidae. It is endemic to Colombia and found on the western versant of the Cordillera Occidental in Antioquia, Risaralda, Chocó, and Valle del Cauca Departments, at elevations of 1,140–2,500 m (3,740–8,200 ft) asl.

The natural habitat of Gastrotheca antomia is Andean cloud forest. It is threatened by habitat loss.

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