In which city is the show primarily set?

In which city is The Big Bang Theory primarily set? The answer is Pasadena. The sitcom follows physicists Leonard Hofstadter and Sheldon Cooper, who share an apartment in Pasadena, California, while working at the California Institute of Technology, commonly called Caltech.

Pasadena provides the show's central setting, including the apartment building, the Caltech campus, the comic book store, and the Cheesecake Factory where Penny initially works. Although some stories take the characters elsewhere, Pasadena remains the fictional home base for the group throughout the series.

A common mix-up is Los Angeles, because Pasadena is part of the greater Los Angeles metropolitan area and the series was produced in Los Angeles. Pasadena, however, is a separate city northeast of downtown Los Angeles. The show's real-world locations were generally represented through studio sets rather than extensive filming on location.

The Big Bang Theory premiered in 2007 and ran for 12 seasons, ending in 2019 after 279 episodes. Its Pasadena setting connects the characters' academic careers, friendships, and everyday routines in one recognizable Southern California community.