Taricha torosa, commonly known as the California Newt, is native to the United States, specifically in the coastal ranges of California. Its geographical distribution extends from Mendocino County in the north to San Diego County in the south, largely along the Pacific coast and adjacent inland areas.

The California Newt inhabits moist environments where water is readily available. Typical habitats include oak woodlands, redwood forests, and grasslands, with a preference for areas near streams, ponds, and other water bodies necessary for breeding. The climate within these regions is generally Mediterranean, characterized by wet winters and dry summers.

Taricha torosa plays a role in controlling insect populations and serves as both predator and prey within its ecosystem. During the breeding season, they are often found in aquatic environments, whereas, in the non-breeding season, they are typically found under logs, rocks, or in leaf litter in terrestrial environments that provide moisture and cover. The species is known for its potent tetrodotoxin, which provides it with a defense against many potential predators.