Sphaerodactylus underwoodi, also known commonly as Underwood's least gecko or the Turks Islands geckolet, is a small species of lizard in the family Sphaerodactylidae.

The species is endemic to Grand Turk Island.

[2] The specific name, underwoodi, is in honor of British herpetologist Garth Leon Underwood.

[3] The preferred habitat of S. underwoodi is shrubland.

This article about a Sphaerodactylus is a stub.