Clearance can refer to:
- Authorization or permission from an authority
- Air traffic control clearance in aviation
- Security clearance, a status granted to individuals allowing them access to classified information
- Engineering tolerance, a physical distance or space between two components
- Ground clearance, the amount of space between the base of an automobile tire and the underside of the chassis
- Clearance (medicine), the rate at which a substance is removed or cleared from the body by the kidneys or in renal dialysis
- Clearance rate, in criminal justice, the number of crimes "cleared" divided by the number reported
- Closeout (sale), in retail, the final sale of items to zero inventory
- Customs clearance, in international trade, the movement of goods through customs barriers
- Deforestation, the deliberate clearance of woodland or forest for human development
- In Australian rules football, the clearing of the ball out of a ball-up situation
- A chess term for removal of pieces from a rank, file or diagonal so that a bishop, rook or queen is free to move along it
- The Highland Clearances, forced displacements of people in Scotland in the 18th and 19th centuries
- Rights clearance, the licensing of copyright and related rights