Tropidonophis dolasii is a species of snake in the subfamily Natricinae of the family Colubridae. The species is endemic to Papua New Guinea.
The specific name, dolasii, is in honor of Papua New Guinean, Dolasi Salepuna, for his field assistance.
The preferred natural habitat of Tropidonophis dolasii is forest in association with freshwater wetlands, at altitudes of .
Tropidonophis dolasii preys upon frogs.
Tropidonophis dolasii is oviparous.