The Zordon Era is an unofficial term used by the fans of Power Rangers, to refer to the first six season of Power Rangers, including Mighty Morphin Power Rangers, Power Rangers: Zeo, Power Rangers: Turbo, and Power Rangers In Space. It is called the Zordon Era because Zordon serves as the Mentor to the Rangers during the first four seasons and remains a significant plot related character throughout the next two seasons, culminating in his death in Countdown to Destruction. Several seasons that came after the Zordon Era included characters or connections to Zordon Era. They are Power Rangers Lost Galaxy, Power Rangers Dino Thunder, Power Rangers Operation Overdrive, Power Rangers Samurai, Power Rangers Super Samurai, and Power Rangers Super Megaforce.
Other than Zordon being a main character, there were also several similarities that were abandoned (some, without explanation) after the Zordon Era ended (a point that is unofficially referred to as the Post Zordon Era).
- Every season was a continuation of the previous one.
- The Rangers were assisted by a sentient robot named Alpha 5 or Alpha 6 (this would be continued for one more season in the first season of the Post Zordon Era, Lost Galaxy), whose name would often be shortened to simply Alpha.
- With the exception of In Space, the Rangers' mentor lived inside a glass tube.
- The Rangers attended high school.
- Every season of the Zordon era took place in the fictional city of Angel Grove.
- Bulk and Skull provided comic relief (while Bulk still provided comic relief, in Samurai and Super Samurai, this time, with Skull's son Spike).
- The Rangers, unlike their Sentai counterparts, had the ability to instantly teleport to any destination (even between temporal dimensions).
- The rangers all wore communication devices, simply called "communicators," on their wrists.
- With the exception of In Space, the Rangers held their base of operations in a futuristic place called the Command Center or the Power Chamber.
- The Zordon Era is the first of the four eras of Power Rangers.
- It is the first era that featured a storyline that carried over from season to season. The second would be the New Saban Era.
- It is the second longest era of Power Rangers, consisting of six seasons. The longest is the Disney Era, with seven seasons.