Swallowtail

Swallowtail may refer to:


 * Swallowtail butterfly, large colorful butterflies from the family Papilionidae
 * Swallowtail Butterfly (film), 1996 film directed by Shunji Iwai
 * Swallowtail catastrophe or swallowtail surface, a singularity occurring in the part of mathematics called catastrophe theory
 * Swallow-tail coat, a formal tailcoat worn traditionally as part of the white tie dress code
 * Swallowtail (flag), a term in vexillology
 * Swallowtail joint in woodworking, see Dovetail joint
 * The Swallow's Tail, a painting by Salvador Dalí, inspired by the swallowtail catastrophe
 * Swallowtail, a butler café in Tokyo, Japan
 * Swallowtail, a Wolf Alice song from their debut album My Love Is Cool
 * Swallowtail (album), 2024 album by Jim White and Marisa Anderson