Western white butterfly
- kingdom: Animalia
- phylum: Arthropoda
- class: Insecta
- order: Lepidoptera
- family: Pieridae
- genus: Pontia
- species: Pontia occidentalis
Inuvik
Northwest TerritoriesAtikokan
OntarioLloydminster
Moose Jaw
Regina
SaskatchewanDawson City
Yukon
CanadaFairbanks
AlaskaCrested Butte
ColoradoGreat Falls
MontanaBurns
Eugene
Warm Springs
OregonSouth Weber
Uintah
UtahBrewster
WashingtonWorland
Wyoming
United States