Pygochelidon is a genus of birds in the swallow family Hirundinidae that occur in the Neotropics.
The genus Pygochelidon was introduced in 1865 by the American naturalist Spencer Fullerton Baird with the blue-and-white swallow as the type species. The name combines the Ancient Greek pugàmeaning "rump" with khelidà Ân meaning "swallow".
This genus was formerly treated as a junior synonym of the genus Notiochelidon. It was resurrected to contain a clade of two species based on a genetic study published in 2005.
The genus contains two species: