Rhagastis olivacea, the olive mottled hawkmoth, is a moth of the family Sphingidae.

It is found from north-western India across Nepal, northern Myanmar, northern Thailand and southern China to northern Vietnam.

It can be distinguished from all other Rhagastis species by the yellowish-green ground colour of the forewing upperside with narrow and indistinct reddish transverse lines and bands, and a shuttle-shaped marginal area bordered irregularly with bluish-white scales, most strongly at the apex and tornus.

Adults are lachryphagous (meaning they drink tears).

[3] Larvae have been recorded feeding on Impatiens species in India.