Koos Meinderts (born 20 January 1953) is a Dutch writer of children's literature.

Meinderts made his debut in 1983 with the children's book Mooi meegenomen.

[2] In 2017, he won the Gouden Griffel for his book Naar het noorden.

[1] Meinderts won the Vlag en Wimpel award three times: in 2003 for the book Keizer en de verhalenvader, in 2018 for the book Dag poes!

together with Bette Westera, Sjoerd Kuyper, Hans Hagen and Monique Hagen and in 2019 for the book De schelmenstreken van Reinaert de Vos.