Battus polydamas, also known as the gold rim swallowtail, the Polydamas swallowtail or the tailless swallowtail, is a species of butterfly in the family Papilionidae. The species was first described by Carl Linnaeus in his 10th edition of Systema Naturae, published in 1758.

The wingspan is 90 to 120 mm without the tail. The top of the wings are black with a broad submarginal band formed by large yellow spots. The undersides of the forewings have the same pattern, while the hindwings have a submarginal row of red lunules. This butterfly flies from April to November in three generations in the north of its range, throughout the year in several generations in the tropics. The larvae feed on Aristolochia plant species.

It is found in the Neotropical realm of South America, the southeastern U.S., and Mexico.