Oerlikon may refer to:

• OC Oerlikon (former Unaxis), a Swiss technology conglomerate, or one of its business units:
  • Oerlikon Solar
  • Oerlikon Balzers
  • Oerlikon Leybold Vacuum
• Oerlikon-Bührle, a company in Zürich, Switzerland that used to own Bally Shoe, Oerlikon Contraves, Pilatus Aircraft and Britten-Norman Aircraft; see Fairey Aviation Company
• Maschinenfabrik Oerlikon, the Oerlikon subsidiary later became Oerlikon-Bührle, and is now part of Asea Brown Boveri
• Oerlikon Contraves, a Swiss anti-aircraft artillery manufacturer founded in Zürich Oerlikon
  • Oerlikon KBA, a 25 mm cannon
  • Oerlikon 20 mm cannon, an anti-aircraft cannon
  • Oerlikon 35 mm twin cannon, an anti-aircraft cannon

• Oerlikon (Zürich), a district in the northern part of Zürich, Switzerland
• Zürich Oerlikon railway station located in Zürich
• Oerlikon, a world in M. A. Foster's "The Morphodite Trilogy"