The Darevsky's viper (Vipera darevskii) is a small, secretive species of venomous snake. As is characteristic of most European vipers, the Darevsky's viper is adorned with a distinctive brown zigzag pattern along its back. This species has a dark streak extending from the eye to the neck, which terminates before the beginning of the zig-zag body pattern. It also has a conspicuous row of light brown spots along each side of the body that often merge into a continuous stripe.

The Darevsky's viper is named in honour of Ilya Darevsky who discovered an isolated population of the species later formally described as Vipera darevskii.