Blackshirts were originally the paramilitary wing of the Kingdom of Italy.

Blackshirts or Black Shirt may also refer to:

• Blackshirts (India), an anti-religious atheist quasi-political movement in India
• British Union of Fascists, whose party nickname was "Blackshirts"
  • Stewards (paramilitary organisation), their paramilitary unit
• Schutzstaffel (SS), a Nazi military organization
• Ustaše Militia, wearing similar uniforms to their Italian allies
• Blackshirts (American football), the informal name for the University of Nebraska-Lincoln football team defense
• Black Shirt (film), a 1933 Italian drama film
• "La Camisa Negra", a 2006 song by Juanes which translates to "The Black Shirt"
• The Blackshirt, the official newspaper of Oswald Mosley's British Union of Fascists