SFGAmWorld.com
- This unofficial Six Flags Great America site has news, photos, discussion and more.
- http://www.sfgamworld.com/

sfafans.com - The Unofficial Site dedicated to Six Flags America
- Unofficial Fan Site for Six Flags America in Washington, D.C.
- http://www.sfafans.com/

ParkTimes
- History of the park Six Flags over Texas, the First Six Flags park.
- http://parktimes.com/

Six Flags New England Central
- Provides park information, news, pictures, videos, forums, and official updates of the Six Flags New England park
- http://www.sfne.com

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.
- http://sfog.playride.com/homepage.html

GadvUpdates
- Contains park information, parents', lodging, and Wild Safari guides. Forums.
- http://gadvupdates.com/forums/

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)
- http://saveastroworld.com/

SFFT Online - The guide to Six Flags Fiesta Texas
- SFFT Online is the most comprehensive online guide to Six Flags Fiesta Texas in San Antonio, Texas.
- http://sfftnet.com

SFOT-Source.com
- An unofficial guide to Six Flags Over Texas.
- http://www.sfot-source.com

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.
- http://www.sfot.net

Six Flags Over Georgia NET
- Featuring news, photos, general information, ticket prices and forums.
- http://www.sfog.net

SFMW Zone
- News, dining, shopping, weather, new attractions and details about Marine World in Vallejo, California.
- http://sfmwzone.com

Six Flags New Orleans Info
- Unofficial site offers park information and pictures.
- http://sfno.com/

Unofficial Guide to Six Flags Great America
- Information on rides, food, lodging, and weather. [Gurnee, IL]
- http://www.coasterchild.com

It's Magic Mountain
- Information on Six Flags Magic Mountain in Valencia, CA, with frequently asked questions and park maps.
- http://members.tripod.com/heylownine/sfmm.htm

Six Flags INC.
- (OFFICIAL SITE) for the parks, with multiple locations in the United States. Includes facility, admission, and attraction information.
- http://www.sixflags.com/