Nanorana polunini (common names: Langtang paa frog, Smith frog, Polunin's paa frog, Polunin's spiny frog) is a species of frog in the family Dicroglossidae. It is found in Nyalam County in southern Tibet (China), Nepal, and possibly Kashmir (India). It is a common species in Nepal but rare in China. It lives in stream habitats in montane forest.
Nanorana polunini are medium-sized frogs, attaining a snoutâÂÂvent length of about .