Once Upon a Witch's Death (ある魔女が死ぬまで, Aru Majo ga Shinu Made) is a Japanese light novel series written by Saka and illustrated by Chorefuji.

It was later acquired by ASCII Media Works who began publishing it under their Dengeki no Shin Bungei light novel imprint in December 2021.

A manga adaptation illustrated by Kenu Amearare began serialization in ASCII Media Works' Dengeki Comic Regulus magazine in March 2023.

An anime television series adaptation produced by EMT Squared is set to premiere in April 2025.

Written by Saka, Once Upon a Witch's Death was serialized as a web novel published on the Kakuyomu website from October 3, 2019 to August 26, 2022.