It is illegal to wear a mask in public to conceal your identity.

The Law Explained

With a few exceptions for Halloween, theatrical productions, and medical emergencies, wearing a mask in public to hide your face is a crime in Mississippi. This law was originally passed in the mid-20th century to combat the Ku Klux Klan and prevent them from intimidating citizens anonymously. While well-intentioned, it created an interesting legal gray area during the recent global pandemic.