The Deer King

is a Japanese fantasy novel series written by Nahoko Uehashi. Kadokawa published the original novel in two volumes in September 2014, and then republished it in four reprinted volumes between June and July 2017. A manga adaptation with art by Taro Sekiguchi was serialized online via Kadokawa Shoten's Young Ace Up website between July 2021 and March 2022. It was collected in two tankōbon volumes. An anime film adaptation by Production I.G premiered on February 4, 2022.