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County Prison is a prison in Super Power Island. It is found on Main Street.
A meteor crashed into the Prison, allowing 6 prisoners to escape. These six prisoners also mutated from the radiation from the meteor and gained various super powers that allowed them to commit crimes.
- This is where a super villain is automatically transported to and locked in when a hero captures them with Anti-Power handcuffs.
- It is one of four prisons in Poptropica, with the others being Harbor Prison, Diamond Plains Prison, and Erewhon Prison.
- The prison resembles Alcatraz Prison, and may be based on it.