Calamaria lumholtzi, also known commonly as Lumholz's reed snake, is a species of snake in the subfamily Calamariinae of the family Colubridae. The species is native to Indonesia.
The specific name, lumholtzi, is in honor of Norwegian explorer Carl Sofus Lumholtz.
Calamaria lumholtzi is found on the island of Borneo.
The preferred natural habitat of Calamaria lumholtzi is forest, at altitudes of about .
Calamaria lumholtzi is terrestrial.
Calamaria lumholtzi is oviparous.