- GadvUpdates - Unofficial Great Adventure site. 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.
- SFMW Zone - News, dining, shopping, weather, new attractions and details about Marine World in Vallejo, California.
- SFWoA Online - An unofficial news and discussion site about Six Flags Worlds of Adventure. Includes trip planning guide, message boards, and reviews.
- Six Flags - Official site for the parks, with multiple locations in the United States. Includes facility, admission, and attraction information.
- Six Flags Fiesta Texas - Located in San Antonio. Offers facility information and news, employment opportunity section, and show schedule.
- Six Flags Magic Mountain - Highlights the rides, shows, attractions, kids events and schedule calendar. Admission rates, group discounts and contact information listed.
- Six Flags New Orleans Info - Unofficial site offers park information and pictures.
- Six Flags Over Georgia - Atlanta-area theme park's online guide to rides, events and shows, shops and food, and other park information.
- Six Flags Over Georgia NET - Featuring news, photos, general information, ticket prices and forums.
- Six Flags Over Texas - Features directions, calendar, pricing, shows, events, rides, and employment. [Arlington, TX]
- Six Flags Over You - Unofficial site with information and guide. Details on rides, shows, games, park information and events.
- SixFlags America - Located in Largo, Maryland; serving the Washington and Baltimore areas. Site includes hours and directions, guides to rides and events, employment information, and park news.
- 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.
- Wyandot Lake Adventure Park - Official site for the park, with ride guide, events schedule, and employment information. Located in Powell, Ohio.