Orion is a proper name used in many different ways:

• Orion the hunter, from Greek mythology
• Orion the constellation
• Orion the spiral arm in the Milky Way
• Orion Nebula also known as M42
• Orion , a commune in the Pyrénées-Atlantiques département in France
• Orion the communications satellite
• Project Orion, a proposed nuclear pulse propulsion system
• The ORION Network - The Ontario Research and Innovation Optical Network in Canada
• Orion- The student newspaper of California State University, Chico
• Orion Irvine is the National Youth Issues Representative at the Canadian Labour Congress

In literature and popular culture

• Orion the comic book character, the son of Darkseid
• Orion the manga by Masamune Shirow
• Orion the song from the Master of Puppets album by Metallica
• Master of Orion, the computer game
• Orions, an alien race in the Star Trek fictional universe
• Orion's belt is a plot point in the first Men In Black movie

As a brand name or designator

• Orion brand beer, from Japan
• Orion brand of television sets, from Japan
• The Ford Orion, an automobile model of the Ford Motor Company
• Lockheed P-3 Orion, an anti-submarine warfare aircraft
• Orion former manufacturer of radio and television sets, from Hungary
• Orion Application Server, a J2EE server

Companies

• Orion Bus Industries , a subsidiary of DaimlerChrysler, based in Oriskany, New York
• Orion Pictures Corporation, a defunct movie company
• Orion Publishing Group , owned by Hachette livre
• Orion Group , from South Korea

Orion, car audio company until bought by Directed Electronics.

Rockets

• An American sounding rocket, Orion (US-rocket)
• A sounding rocket of Argentinia, Orion (Rocket of Argentinia)