It is endemic to Northeast India and only known from its type locality, Mokokchung in Nagaland.

[1][2][3] Nanorana mokokchungensis is a robust-bodied and relatively large frog, reaching 87 mm (3.4 in) in snout–vent length.

The finger tips are swollen but not dilated into discs; no webbing is present.

Dorsal colouration is uniformly grey, but the upper eyelids are yellowish-grey.

[3] Nanorana mokokchungensis is a semi-aquatic frog known from hill streams at elevations of 1,000–1,400 m (3,300–4,600 ft).