Spiders found in California include 20 unique species from 121 confirmed sightings based on contributions made by Spider ID members. It is important to remember that spiders seen in California are not bound by the territorial lines decided on by humans, therefore their distribution is subject to change. Occasionally, spiders can be found well outside of their known range due to being intentionally or accidentally transported by humans in cars, luggage, and other belongings.
Have you photographed spiders in California?
Please consider submitting pictures to expand our confirmed sightings.