Chaos is when something unpredictable or random happens. It may refer to several different things:

• Chaos magic, a branch of occultism
• Chaos (mythology), the concept in classical creation stories
• Randomness, a lack of intelligible pattern or combination
• Chaos theory, a branch of mathematics and physics
• Chaos (genus), a type of giant amoeba
• 19521 Chaos, a Trans-Neptunian Kuiper belt object in space
• K-os, Canadian musician
• Chaos an American hip hop Recoring artist