Only two California cities made Movoto's list of nerdiest cities in America and they're not Los Angeles or San Francisco. The state's capitol, Sacramento, however, comes in at No. 4. These costumed "Harry Potter" fans converged for a midnight showing, but nerds have plenty to keep them busy around the town. The Sac-Con comic, toy, and anime show is one attraction in a city known for having its share of comic book stores.