The graphic violent content of the film led to its being banned in several countries, and it was rejected by the UK until 1993. It was not rated in the US.
After filming ended, director Sergio Corbucci instructed Franco Nero to drag Django's coffin up a hill without turning around. By the time Nero reached the top, the filming crew had already disassembled the sets, packed their equipment and left the scene.
The film spawned hundreds of unofficial sequels. Some had incorrectly, and unauthorizedly, "Django" put in the translation title and other characters renamed "Django" in order to cash in on the original. In Germany, the film was so popular that almost every Franco Nero western, and even random spaghetti westerns, bore the name "Django" in the title.
The title "Django" is a reference to renowned jazz guitarist Django Reinhardt, who had a crippled hand. Viewers at the time would have been aware of this allusion.
Franco Nero was just 25 years old when he appeared in this film. Make-up was used to make him appear older.