Warrant may refer to:

• Warrant (law), a form of specific authorization
  • Arrest warrant, authorizing the arrest and detention of an individual
  • Search warrant, a court order issued that authorizes law enforcement to conduct a search for evidence
  • Execution warrant, a writ that authorizes the execution of a condemned person
• Warrant (philosophy), a proper justification for holding a belief
• Warrant (rhetoric), the assumption or principle that connects data to a claim
• Quo warranto, a writ requiring a person to show authority for exercising some right or power