A list of events that occurred on July 4 (Independence Day in the US) related to Six Flags. This is often a common opening date for rides that can't reach the Memorial Day deadline.
- 1984 – Grand opening of Six Flags AutoWorld.
- 2014
- Zumanjaro: Drop of Doom opens at Six Flags Great Adventure
- 22 guests riding Ninja at Six Flags Magic Mountain are stranded for over two hours after a tree branch spontaneously falls onto the coaster track, causing the train to crash into it. Four of the 22 guests were injured, but none serious enough to require a hospital visit.
- 2018 – July 4th Fest 2018 ends at Six Flags St. Louis, Six Flags Magic Mountain, Six Flags Discovery Kingdom, and Six Flags Great America.
- 2019 – Maxx Force opens at Six Flags Great America.