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.
New Orleans: Provides park information, news, pictures, videos, forums, and official updates of the Six Flags park in New Orleans.
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 - The guide to Six Flags Fiesta Texas: SFFT Online is the most comprehensive online guide to Six Flags Fiesta Texas in San Antonio, Texas.
SFGAmWorld.com: This unofficial Six Flags Great America site has news, photos, discussion and more.
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 Great America News: Your Source for News and Information on Six Flags Great America. Features Pictures, Videos, Forums, Coaster Tracker, and a massive amount of park information.
Six Flags INC.: (OFFICIAL SITE) for the parks, with multiple locations in the United States. Includes facility, admission, and attraction information.
Six Flags New England Central: Provides park information, news, pictures, videos, forums, and official updates of the Six Flags New England park
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.