A new species of the cyrtodactyline gecko, Cyrtodactylus surin sp. nov., is described from the Surin Islands located off the west coast of Southern Thailand in Phang-nga Province. This species is similar to C. macrotuberculatus on the basis of its strong tuberculation on the dorsum but is differentiated from that species on the basis of scale characteristics in the preclocal region. This represents the first endemic species known from the offshore islands of Thailand