Euchloe guaymasensis, the Sonoran marble or Sonoran white, is a species of butterfly in the family Pieridae.

[1] It is native to Sonora in Mexico and has been seen once in Arizona in the United States.

[1] This species occurs in rocky desert habitat.

Its host plant is western tansymustard (Descurainia pinnata).

[1] This species was first collected in 1983 from a microwave relay 40 miles (64 km) north of Guaymas in Sonora.