Telmatobufo bullocki is a species of frog in the family Calyptocephalellidae.

[2] It is endemic to Chile, and is only known from a few locations in the Cordillera de Nahuelbuta, a part of the Chilean Coast Range.

It is extremely rare; extensive fieldwork in 1992–2002 turned up only a single adult.

It occurs in fast-flowing streams in temperate Nothofagus forest.

The tadpoles are free-swimming and feed on algae growing on submerged rocks.