The novel has been adapted into an anime television series adaptation by Madhouse, consisting of four seasons with thirteen episodes each, with the first season airing from July to September 2015. Two compilation anime films recapping the events from the first season were released in Japan in February and March 2017, respectively. The second season ran from January to April 2018, the third season ran from July to October 2018, and the fourth season ran from July to September 2022. An anime film has been announced.

Kono Light Novel ga Sugoi! 2017's Series Ranking". Anime News Network. November 23, 2016 . Retrieved April 11, 2018.Hodgkins, Crystalyn (October 6, 2018). "New Isekai Quartet Anime Project Crosses Over Overlord, Re:Zero, Tanya, Konosuba Franchises". Anime News Network . Retrieved December 9, 2018. Bundled with the Overlord series, it has inspired an anime special based on the Pleiades, aptly titled, Pure Pure Pleiades, featuring super chibi characters. I think the wait for the next volume will be quite long again, so I would be happy if you could take it easy and wait for it in a carefree manner. So long, then,” Maruyama wrote. Overlord Anime Has Compilation Film in the Works". Anime News Network. September 29, 2016 . Retrieved November 5, 2016.

Pineda, Rafael Antonio (May 16, 2018). "OxT, MYTH&ROID Perform Songs for Overlord III Anime Season". Anime News Network . Retrieved May 16, 2018. in Japanese). Kadokawa Shoten. Archived from the original on August 18, 2016 . Retrieved July 19, 2016. a b Cardine, Kyle (October 25, 2014). " Over Lord Fantasy RPG Light Novels Gets Manga". Anime News Network . Retrieved October 25, 2014. Kono Light Novel ga Sugoi! Reveals 2018 Series Ranking". Anime News Network. November 24, 2017 . Retrieved April 11, 2018. Top-Selling Light Novel Series of 2015 Announced". Archived from the original on January 30, 2022 . Retrieved February 1, 2016.Green, Scott (May 30, 2016). " "Overlord" Light Novel To Include Super Deformed "Pleiades" Blu-ray". Crunchyroll. Archived from the original on May 31, 2016 . Retrieved May 30, 2016. In June 2015, prior to the release of the anime and manga, the light novel series had about 600,000 copies in print in Japan with eight volumes. By August 1, 2015, the light novel and manga series had a total of 1 million copies in circulation in Japan. On August 4, a 600,000-copy reprint of the novels was announced. By August 20, 2015, the nine-volume Overlord light novel series and two-volume manga series have, together, more than 1.5 million copies in circulation in Japan. [107] By September 18, 2015, Overlord light novel and manga has over 2 million copies in circulation. [108] By May 2016, the Overlord light novel series had 2.5 million copies in print. [109] Overlord has since been named the top-selling light novel series of 2015. [110] By April 2018, the light novel and manga combined had over 7 million copies in print. [111]