Sphenomorphus helenae, also known commonly as the Notaburi forest skink, is a species of lizard in the subfamily Sphenomorphinae of the family Scincidae.

[2] The specific name, helenae, is in honor of American herpetologist Helen Beulah Thompson Gaige.

[3] S. helenae is known only from the type locality, "Nontaburi" (= Nonthaburi), which is in central Thailand.

[1][2] The preferred natural habitat of S. helenae is unknown.

[4] According to British herpetologist Malcolm Arthur Smith, the holotype is an immature specimen.