A list of events that occurred on January 12 related to Six Flags.

• 2000 – Marc Davis dies.
• 2002 – X2 opens at Six Flags Magic Mountain.
• 2018 – Pete Carmichael is named Park President of Six Flags New England, succeeding John Winkler.
• 2019 – Pirates of the Deep Sea opens at Six Flags Fiesta Texas.