Green Lantern rings are fictional power rings possessed by characters in comic books. A DC Comics superhero, the Green Lantern was created by Martin Nodell and Bill Finger. Since the debut of the original Green Lantern in 1940, several different Green Lantern characters have been created.

Green Lantern power rings are capable of generating myriad effects in the world of comics, allowing the user a high level of control over physical aspects of the world. However, the power of the ring is sustained by the Green Lantern's strength of will. This will power imparts higher ring efficiency with greater levels of control.

In the fantasy realm, Green Lantern power rings allow the wearer to fly and generate protective force fields. They also afford the user ability to produce beams and other solid structures, moving them with power of thought. The Green Lantern's use of this capability involves chasing criminals, erecting battering rams, and even transporting items. Power rings are also useful for finding certain items and translating languages. They usually hold a limited charge. Some Green Lantern rings need to be charged every 24 hours. A portable power cell, designed to look like an old-fashioned green lantern, is often used to recharge the power rings.

Perhaps as a testament to the popularity of the Green Lantern, toy versions of these power rings are collector's items. Some of these rings were created and sold many years ago, while others were designed in the last decade. Today, they are often bought and sold through online auctions.