The Carson Mansion is a large Victorian house located in Old Town, Eureka, California.

Regarded as one of the highest executions of American Queen Anne Style architecture, the house is "considered the most grand Victorian home in America." It is one of the most written about and photographed Victorian houses in California, and perhaps, in the United States.

Originally the home of William Carson, one of Northern California's first major lumber barons, since 1950 it has been a private club, The house and grounds are not open to the public.