Infinite Stratos, also written as IS <Infinite Stratos> (Japanese: IS〈インフィニット・ストラトス〉, Hepburn: IS <Infinitto Sutoratosu>), is a Japanese light novel series by Izuru Yumizuru with illustrations provided by Okiura (original MF novels) and CHOCO (new Overlap novels). As of October 2013, seven volumes have been published by Media Factory under their MF Bunko J label. From volume 8 onwards, the novels are published by Overlap under their Overlap Bunko label.

A manga adaptation by Kenji Akahoshi was serialized in the seinen manga magazine Monthly Comic Alive from May 2010 to July 2012 with five volumes published under their Alive Comics imprint. A 12-episode anime adaptation by Eight Bit aired in Japan between January and March 2011, and an original video animation (OVA) episode was released on December 7, 2011. The anime is licensed by Sentai Filmworks in North America, who released the series in April 2012. A second series aired from October to December 2013.