Euastacus dalagarbe is a species of freshwater crayfish endemic to Australia that belongs to the family Parastacidae.

It has a small range in New South Wales and is regarded by the International Union for Conservation of Nature as "critically endangered".

Euastacus dalagarbe is one of four new species of freshwater crayfish that were first described by Coughran in 2005 during surveys of the northeastern part of New South Wales.

[2] Euastacus dalagarbe is endemic to a small area in the Border Ranges National Park in New South Wales.

Forest fires or other natural disasters could significantly impact populations, and because of its fragmented range, it is particularly vulnerable to habitat loss, with little possibility of dispersing to new locations.