Rieko Nakagawa (中川李枝子, Nakagawa Rieko, born September 29, 1935, in Sapporo, Hokkaido, Japan) is a Japanese children's literature writer and lyricist. Her first work, Iyayaen, was published in 1962, and she has published over 30 books since then. She has won multiple awards for her works, including the Kikuchi Kan Prize.
She wrote the lyrics for the opening theme song for the 1988 Studio Ghibli film My Neighbor Totoro as well as to another song used in the film. She has written the lyrics for over 20 other songs, including "Yūki" sung by Mana Ashida for the 81st NHK All Japan School Singing Competition.