The Pacific white-sided dolphin is commonly found in the waters off the Pacific Coast, especially in the cooler northern regions.

Pacific white-sided dolphins are a common sight in the waters off the Pacific Coast, particularly in areas like Northern California and the Pacific Northwest. Known for their playful nature and distinctive black-and-white coloration, these dolphins thrive in cooler waters and are often seen in large pods. While bottlenose dolphins and orcas are also present in the region, the Pacific white-sided dolphin is the species most frequently encountered in this area.