- GadvUpdates - Contains park information, parents', lodging, and Wild Safari guides. Forums.
- It's Magic Mountain - Information on Six Flags Magic Mountain in Valencia, CA, with frequently asked questions and park maps.
- ParkTimes - History of the park Six Flags over Texas, the First Six Flags park.
- Save Six Flags Astroworld - A site dedicated to saving Six Flags Astroworld in Houston TX (Note: the Astroworld Park has already been lost, however this site does have demomition pictures and information on why it was lost)
- sfafans.com - The Unofficial Site dedicated to Six Flags America - Unofficial Fan Site for Six Flags America in Washington, D.C.
- SFFT Online - A guide to Six Flags Fiesta Texas in San Antonio, Texas.
- SFGAmWorld.com - This unofficial Six Flags Great America site has news, photos, and discussion.
- SFMW Zone - News, dining, shopping, weather, new attractions and details about Marine World in Vallejo, California.
- SFOT Former Employee Website - A Site were former Six Flags Over Texas Employees talk about the memories of the park and what they think about the changes from year to year.
- SFOT-Source.com - An unofficial guide to Six Flags Over Texas.
- Six Flags INC. - (OFFICIAL SITE) for the parks, with multiple locations in the United States. Includes facility, admission, and attraction information.
- Six Flags New Orleans Info - Unofficial site offers park information and pictures.
- Six Flags Over Georgia Guide - An unofficial guide to SFOG, featuring info to help you plan your visit.
- Six Flags Over Georgia NET - Featuring news, photos, general information, ticket prices and forums.
- Six Flags Over You - Unofficial site for Six Flags Over George. Details on rides, shows, games, park information and events.
- Unofficial Guide to Six Flags Great America - Information on rides, food, lodging, and weather. [Gurnee, IL]
- Unofficial Guide to Six Flags Over Georgia - News, operation hours and ticket information, tips for a good park visit, maps, and guide to closed attractions.
