The Sikkim keelback (Herpetoreas sieboldii) is a species of grass snake in the family Colubridae.

The species is endemic to South Asia and Myanmar.

[3] It is closely related to the Himalayan keelback, and some treat this species as a synonym (Tillack 2003).

H. sieboldii is found in Bangladesh, Bhutan, India (Punjab, Sikkim, Uttar Pradesh), Myanmar (formerly called Burma), Nepal, and Pakistan.

[2] The specific name, sieboldii, is in honor of German zoologist Karl Theodor Ernst von Siebold.