Gyeongseong Creature (Korean: 경성크리처) is a South Korean historical mystery-horror television series written by Kang Eun-kyung, directed by Jung Dong-yoon, Roh Young-sub and Jo Yeong-min, and starring Park Seo-joon, Han So-hee, Claudia Kim, Lee Moo-saeng and Bae Hyun-sung.

Set in 1945, during the occupation of Gyeongseong (the old name for Seoul) by the Imperial Japanese Army, the story depicts the brutality inflicted on civilians by the Japanese forces, subjecting men and women to secret biological experiments, the rebels who rise against them, and the monster creature produced from human experimentation. The story was inspired by the real-life Unit 731, a covert Japanese military unit that tested biological and chemical weapons on civilians during World War II.

The first season was released on Netflix from December 22, 2023 to January 5, 2024. The second season was released on September 27, 2024.