It is endemic to Borneo where it is found in Kalimantan (Indonesia), Brunei, and Sarawak (Malaysia).

The flanks have white glands that can fuse to form a longitudinal ridge.

[3] The tadpoles of Leptobrachella mjobergi are relatively small (total length up to 27 mm (1.1 in)) and have a vermiform or eel-like appearance.

While smaller tadpoles seem to use existing interstitial spaces, larger ones can actively push their way through gravel.

Adults are found on the forest floor, but move to clear, rocky streams to breed.