Night Is Short, Walk On Girl (Japanese: 夜は短し歩けよ乙女, Hepburn: Yoru wa Mijikashi Aruke yo Otome) is a 2017 Japanese animated romantic comedy film directed by Masaaki Yuasa. The film is based on the 2006 novel The Night Is Short, Walk on Girl written by Tomihiko Morimi and illustrated by Yusuke Nakamura, who also served as the film's original character designer. The film was released in North America as The Night Is Short, Walk On Girl, with a leading article added, but in other English-speaking regions without one. It has been awarded the Grand Prize for Best Animated Feature at the Ottawa International Animation Festival and the Japan Academy Prize for Animation of the Year.

The film is a spiritual sequel to The Tatami Galaxy, also based on a novel written by Morimi and directed by Yuasa. Though both works share a Kyoto University setting and some characters, the plotlines are largely unrelated.