Is this a Zombie? (Japanese: これはゾンビですか?, Hepburn: Kore wa Zonbi Desu ka?), also known as Korezom (これゾン, Korezon) for short, is a Japanese light novel series by Shinichi Kimura, with illustrations by Kobuichi and Muririn. Since January 2009, 19 volumes have been published by Fujimi Shobo under their Fujimi Fantasia Bunko imprint. There are five different manga adaptations based on the universe of Kore wa Zombie Desu ka?. A 12-episode anime adaptation produced by Studio Deen aired in Japan from January 11, 2011, to March 31, 2011, on Television Saitama and other networks. A second season, titled Kore wa Zombie Desu ka? Of the Dead (これはゾンビですか? オブザデッド, Kore wa Zonbi Desu ka? Obu za Deddo), aired in Japan from April 5, 2012, to June 7, 2012, on Tokyo MX and other networks.

Ayumu Aikawa was once an ordinary high schooler resurrected as a zombie by a necromancer named Eucliwood Hellscythe after being murdered by a serial killer. As he tries to make the best of his undead life, he encounters a Masō-Shōjo (魔装少女; lit. Magical Garment Girl, a pun on "mahō shōjo," meaning magical girl) named Haruna and inadvertently takes her magic powers, being forced to become a Masō-Shōjo (and therefore crossdress) in the process. With Eucliwood, Haruna, and a vampire ninja named Seraphim living with him, Ayumu helps battle demons known as Megalos while trying to figure out the mystery behind his own death.

Kore wa Zombie Desu ka? began as a light novel series written by Shinichi Kimura, with illustrations provided by Kobuichi and Muririn. The first volume was published by Fujimi Shobo on January 20, 2009, with a total of 19 volumes published as of June 20, 2015 under their Fujimi Fantasia Bunko imprint.

A drama CD for Kore wa Zombie Desu ka? published by Marine Entertainment was released on December 30, 2009. The drama CD was released in both limited and regular editions. Both editions' first pressings came with a B2-sized poster. The limited edition also came with a booklet written by Shinichi Kimura and a telephone card illustrated by Kobuichi and Muririn.

A manga adaptation by Sacchi started serialization in the shōnen manga magazine Monthly Dragon Age on January 9, 2010. The first bound volume was released by Kadokawa Shoten on August 5, 2010, with 8 volumes available in Japan as of December 6, 2013. A 4-koma adaptation called Kore wa Zombie Desu ka? Yes, It's 4-koma Flavor. (これはゾンビですか? はい、4コマ風味です。, Kore wa Zonbi Desu ka? Hai, Yonkoma Fūmi Desu.), illustrated by Mūpa, and a third manga adaptation named Kore wa Zombie Desu ka? Yes, I'm your Wife. (これはゾンビですか? はい、アナタの嫁です。, Kore wa Zonbi Desu ka? Hai, Anata no Yome desu.), illustrated by Ryō Hasemi, are also being serialized in Monthly Dragon Age.

The manga by Sacchi is licensed in North America by Yen Press. The first volume in English was released on March 27, 2012, and as of July 22, 2014, all eight volumes have been published.

An anime adaptation of Is This a Zombie?, first announced on May 17, 2010, was produced by Studio Deen and aired 12 episodes on TV Saitama, Chiba TV, and Sun TV from January 10 to April 4, 2011, with subsequent broadcasts on Gifu Broadcasting System, Inc., KBS Kyoto, Mie TV, Tokyo MX, TV Kanagawa, TVQ, Nico Nico Channel, and AT-X. Episodes 10 and later were pushed back a week due to the 2011 Tōhoku earthquake and tsunami. The series was also simulcast by Crunchyroll on their streaming site. An OVA 13th episode was released on DVD with the eighth light novel on June 10, 2011. The anime is licensed in North America by Funimation (now known as Crunchyroll LLC) and released the series on December 4, 2012. American television network Chiller began airing the show on its Anime Wednesdays block on July 15, 2015. Chiller abruptly ended its "Anime Wednesday" block less than a month afterwards.

A second anime season, titled Is This a Zombie? of the Dead (これはゾンビですか? オブザデッド, Kore wa Zonbi Desu ka? Obu za Deddo), first announced in the July issue of Monthly Dragon Age, aired on Tokyo MX from April 5, 2012, to June 7, 2012, with subsequent broadcast runs on TVQ, Sun TV, Gifu Broadcasting System, Inc., Mie TV, BS11, Chiba TV, TV Kanagawa, TV Saitama and AT-X. An OVA episode was released with the tenth light novel volume on DVD on April 25, 2012, while the eleventh episode was released with the sixth manga volume on October 20, 2012, on Blu-ray. The second season is licensed by Funimation/Crunchyroll LLC for simulcast on their video portals. MVM Films have licensed both series in the United Kingdom.