Vipera seoanei cantabrica is a venomous viper subspecies[2] endemic to the Cantabrian Mountains in Spain.

[3] This subspecies is described as the fourth (of four) main color-pattern types for V. seoanei—a highly polymorphic species.

V. s. cantabrica has a fragmented zigzag pattern that can appear as transverse bands along the back.

[3] It is found in the south central parts of the Cantabrian Mountains in northern Spain.

[3] The type locality given is "Faro, Caurel (Lugo).