Trimeresurus fasciatus is a venomous pit viper species endemic to Djampea Island, Indonesia.

[4] The type specimen is 45.5 cm (17.9 in) in total length, which includes a tail 8 cm (3.1 in) long.

[6] It is found only on Djampea Island, Indonesia.

The type locality given is "Jampea Island" (Djampea, Indonesia).

The catalogue entry at the British Museum of Natural History lists the type locality as "Jampea Id., between Celebes and Flores".