Leptosiaphos koutoui is a species of skink, a lizard in the subfamily Eugongylinae of the family Scincidae. The species is endemic to Cameroon and is only known from the Adamaoua Massif near Meiganga.
The specific name, koutoui, is in honor of Denis Koulagna Koutou (born 1958), former Director of Wildlife and Protected Areas in Cameroon.
The preferred natural habitat of L. koutoui is forest, at altitudes around .
L. koutoui is oviparous.