Pontia occidentalis, the western white, is a butterfly in the family Pieridae. It is found in Western North America.

Western white
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Pieridae
Genus: Pontia
Species:
P. occidentalis
Binomial name
Pontia occidentalis
Reakirt, 1866

The wingspan is 38 to 53 millimeters. The host plants are from the mustard or cabbage family, Brassicaceae. The caterpillars eat especially the flowers, buds and fruit. In the north of the range, one generation flies in June and July; in the south two generations fly from May to August.

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