A list of events that occurred on January 9 related to Six Flags.
- 1914 – Angus G. Wynne is born.
- 2018 – Phil Liggett is named Park President of Six Flags St. Louis, succeeding Pete Carmichael.
- 2020 – West Coast Racers opens at Six Flags Magic Mountain.
- 2022 – Hank Salemi dies.