Demonstration may refer to:
- Demonstration (people), a political rally or protest
- Demonstration (proof), a conclusive mathematical proof
- Demonstration (teaching), a method of teaching by example rather than simple explanation
- Demonstration (military), an attack or show of force on a front where a decision is not sought
- Product demonstration, a sales or marketing presentation such as a:
- Technology demonstration, an incomplete version of product to showcase idea, performance, method or features of the product
- Scientific demonstration, a scientific experiment to illustrate principles
- Exhibition game or Demonstration, a sporting event with no competitive value to any competitor
- Demonstration (acting)
- Demonstration (album), the first EP by We Came As Romans
- Demonstration (Tinie Tempah album), second album by Tinie Tempah