Planet Druidia is the kingdom of King Roland and his daughter/heir Princess Vespa. It is right next door to Planet Spaceball. It has many natural resources, mainly a large supply of air. President Skroob and Dark Helmet (as well as their henchmen the Spaceballs) want to suck the air out of Planet Druidia and use it to save Planet Spaceball (which would also destroy Druidia), but thanks to Lone Starr and the power of The Schwartz, they fail.
It is a parody of Alderaan from the Star Wars franchise.
- Mel Brooks chose the name "Druidia" to set up a gag in which Lone Starr calls Vespa a "Druish Princess", a pun on "Jewish Princess."