Red box may refer to:

• Red Box (band), an 80s British band
• Red box (government), the red, wooden briefcases used by the British government
• Red Box Design Group, a British architecture and interior design company
• Red Box (Los Angeles County) an important junction on the Angeles Crest Highway
• Red box (phreaking), a phreaking device
• Redbox, a DVD rental service
• Eucalyptus polyanthemos, the Red Box species of Eucalypt
• Tornado watch, sometimes referred to as such by meteorologists and storm chasers
• Red Box (Rhapsody), Was a potential rumored API which either ran or was rumored to run Windows software

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