Cyberpunk 2077 is set in the free state of Northern California. Specifically, the action takes place in Night City, a coastal metropolis lodged smack dab between Los Angeles and San Francisco.
Night City is a fictional place, but it has a rich history all its own. It was the setting for Cyberpunk: The Roleplaying Game of the Dark Future, the franchise’s original tabletop RPG product first published in 1988. A second edition was released in 1990, titled Cyberpunk 2020, along with a detailed sourcebook called Night City. Today, it’s also the setting for Cyberpunk Red, the official tabletop prequel to CD Projekt’s video game set some 30 years before the events of Cyberpunk 2077. Everything that happened in those games is canon, so far as we’ve been told, so if you’d like to head straight to the source you can visit R. Talsorian Games and start downloading PDFs right now.