Pseudotyrannochthonius hamiltonsmithi is a species of pseudoscorpion in the Pseudotyrannochthoniidae family.

The colour is mainly olive-brown, with the chelicerae and pedipalps pale reddish-brown.

[1] The species occurs in the Western District of Victoria.

The type locality is Mount Widderin Cave, Skipton, 166 km west of Melbourne.

[1][2] The pseudoscorpions are cave-dwelling, terrestrial predators.