Acmenychus caucasicus is a species of beetle of the family Chrysomelidae. It is found in Armenia, Iran and Turkey.
Adults reach a length of about 5.5-6.5 mm. Externally, the adults are very similar to Acmenychus inermis and it is considered conspecific with A. inermis or as western race of this species by some authors.
No host plant has been documented for this species.