Hajime Isayama (諫山 創, Isayama Hajime, born August 29, 1986) is a Japanese manga artist. His first and currently ongoing series, Attack on Titan, has become one of the best-selling manga series of all time with 100 million copies in circulation as of December 2019.

Isayama was born in Ōyama, Ōita Prefecture, Japan, which is now part of Hita. It was in high school, Hita Rinko Senior High School, that he began submitting manga works to contests. After graduating, he matriculated in the manga design program of the arts department at Kyushu Designer Gakuen. In 2006, he applied for the Magazine Grand Prix known as MGP promoted by Kodansha Ltd. and a short version of Attack on Titan (Shingeki no Kyojin) was given the "Fine Work" award. At age twenty, he moved to Tokyo and worked at an Internet café in order to pursue a career in writing manga. This one-shot would later be included in the series' guidebook and included with the first Blu-ray of the anime adaptation.