Knox Building may refer to:

• Knox Building (Baton Rouge, Louisiana), listed on the National Register of Historic Places in East Baton Rouge Parish, Louisiana
• Knox Building (New York, New York), listed on the National Register of Historic Places in New York County, New York

• The Free Lance Star
• The Free Lance—Star
• The free life
• The Free Lunch Is Over (computing)
• The free man
• The Freeman: Ideas on Liberty
• The Freeman (newspaper)
• The Freemantle 6
• The Freemantle Six
• The Freemasons Arms
• The free network project
• The Free Network Project
• The Free Network project
• The Free network project
• The Free Press (organisation)
• The free republic
• The Free Royal Town of Leżajsk
• The Free Sea
• The Freeshooter
• The Free Shooter
• The Free-Shooter
• The Free Software Foundation
• The Free Spirits
• The Free State
• The Free State of Bottleneck