Keiko Nishi (? ??, Nishi Keiko, born December 26, 1966, in Ibusuki, Kagoshima Prefecture, Japan) is a Japanese manga artist.
After graduating from Kagoshima Prefectural Ibusuki High School, she attended Tsuru University from where she graduated with a degree in Japanese literature.
While still attending Tsuru University, Nishi made her professional manga debut with her story "Matte Iru yo" in Shogakukan's manga magazine Petit Flower.Nishi currently makes a living as an independent manga artist and a teacher.
Her definitive works include Sanban-cho Hagiwara-ya no Bijin and Love Song.
Matt Thorn described her in the mid-1990s as "one of the most popular and respected artists of her (twenty-something) generation."