From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Satan City (サタン シティ, Satan Shiti; FUNimation "Hercule City", Viz "Herculopolis") is a large city on Planet Earth.
Satan City was originally named Orange Star City, but renamed in honor of Mister Satan in commemoration of his supposed victory over Future Cell (when Son Gohan had actually won). Gohan went to Orange Star High School here and fought crime on many occasions as his superhero alias, the Great Saiyaman.
- Mister Satan
- Red Shark Gang (a Satan City street gang)
- Rock (leader of the Red Shark Gang)
- Son Pan (moves here sometime before Dragon Ball GT: A Hero's Legacy)
- Son Videl (moves out sometime after the Kid Buu Saga)
- It is quite possible that Satan City is the same city that appears in Dragonball: Evolution as Goku's school bears a strong resemblance to Orange Star High School. If one looks at key scenes that take place in the school, a logo very similar to the one Orange Star High School uses can be seen in the background.
- Despite all of the English versions of the Dragon Ball games (apart from the European version of Dragon Ball Z: Budokai) referring to Satan as Hercule, the cutscenes that take place in this city in Dragon Ball Z: Budokai 3 show the sign still saying Satan City.