Shingeki no Kyojin won the Kodansha Manga Award in the shounen category in 2011 and was nominated for both the 16th and 18th annual Tezuka Osamu Cultural Prize as well as the 4th Manga Taishou Award. The series was the second highest selling manga series of 2013, with 15,933,801 copies sold.

It has received several spin-off series—both manga and novel; two guidebooks titled Inside and Outside were released on April 9 and September 9, 2013, featuring concept art, character profiles and interviews, which were combined into one and published by Kodansha USA on September 16, 2014; a drama CD created with the anime's staff was included in the January 2014 issue of the magazine; and a two-part live-action film directed by Shinji Higuchi was released in Japanese theaters on August 1 and September 15, 2015 respectively.

Shingeki no Kyojin has been published in English as Attack on Titan by Kodansha Comics USA since June 19, 2012 and in large-size 5-in-1 omnibus editions (subtitled Colossal Edition) since May 27, 2014. Kodansha USA's English release won the 2014 Harvey Award for Best American Edition of Foreign Material. Crunchyroll simulpublishes the manga digitally. The manga has also been published in French by Pika Édition, in Italian by Planet Manga, in German by Carlsen Comics, in Spanish by Norma Editorial in Spain and by Ovni Press in Argentina, in Portuguese by Panini Comics, in Polish by Japonica Polonica Fantasica, in Chinese by Tong Li Publishing Co., Ltd., in Filipino by VIVA-PSICOM Publishing Corporation, in Finnish by Sangatsu Manga, in Russian by Azbooka, and in Turkish by GEREKLİ ŞEYLER Büyük Mavi Yayıncılık Ltd. Şti.