A disk or disc may be:

• A flying disc or, more specifically, a Frisbee, a disk-shaped toy
• The DISC assessment, a psychological test
• Intervertebral disc, in the spines of vertebrates
• Disk (mathematics)
• An accretion disc, in astrophysics
• DİSK, the Confederation of Progressive Trade Unions of Turkey
• A Parking Disc Machine
• DISCs - "Domestic International Sales Corporations' under US law