IMDb: X-Men
- Cast and crew list, reviews, and production information for the animated series.
- http://us.imdb.com/title/tt0103584/

Pazsaz Entertainment: X-Men Cartoon Series
- This site features a cast list, an episode guide with a synopsis for each show, and some background on the X-Men and the series.
- http://www.pazsaz.com/xmen.html

Wikipedia: X-Men (animated series)
- You write the pages, as much or as little as you like, describing your favorite of all the episodes of X-Men: the Animated Series.
- http://www.wikipedia.org/wiki/X-Men_(animated_series)

Nabou.com: The X-Men: The Animated Series
- Complete episode list with summaries and voice cast.
- http://www.nabou.com/x-men/x-men_animated_series/index.html