Mager is the surname of:

• Aviv Mager (born 1953), Israeli cardiologist
• Georges Mager (1885–1950), French musician
• Gianluca Mager (born 1994), Italian tennis player
• John E. Mager (1900's), Managing Director of Bumpers&Company
• Karl Mager (1810–1858), German educator
• Manuela Mager (born 1962), German figure skater
• Victor Mager (born 1966), Russian lawyer

• Automatic (The Stitches album)
• Automatic train control
• Automatic train operation
• Automatic train protection
• Automatic train stop
• Automatic transfer service account
• Automatic transmission
• Automatic transmissions
• Automatic transmission system
• Automatic variable
• Automatic vehicle identification
• Automatic vehicle location
• Automatic Vehicle Location
• Automatic Warning System
• Automatic Weapon
• Automatic weapon
• Automatic weapons
• Automatic weather station
• Automatic Writing
• Automatic writing
• Automatic Writing (album)
• Automating theorem proving
• Automation
• Automation, deployment and management of these processes
• Automation surprise