Magical Circle Guru Guru (Japanese: 魔法陣グルグル, romanized: Mahōjin Guru Guru) is a Japanese manga by Hiroyuki Etō, which was serialized in Enix's Monthly Shōnen Gangan from 1992 to 2003. It was later adapted into an anime series on October 13, 1994. A second manga series was serialized in Gangan Online in 2012.

Mahōjin Guru Guru is a light series aimed at older children. It contains occasional toilet gags and some innuendo. It also is a parody of early role-playing video games (RPGs), particularly turn-based games, such as those in the Dragon Quest series. Information boxes are often displayed on screen with accompanying narration in the traditional RPG style. The overall goal of the two main characters, Nike and Kukuri, is to defeat Giri, the ruler of the darkness. Since the anime is based on an RPG, several side quests need to be completed before they are able to locate him.

A new series based on the manga animated by Production I.G aired from July to December 2017. Crunchyroll streamed the anime, marking the first anime from the Mahoujin Guru Guru franchise to receive an official English release.