Steven Castle Kellogg (born October 6, 1941, in Norwalk, Connecticut) is an American author and illustrator who has created more than 90 children's books.

On November 12, 2011, Kellogg was given an honorary Doctor of Humane Letters from the University of Findlay in Ohio.

All of his original illustrations were donated to the Mazza Museum of International Art from Picture Books at Findlay.

The donation was made possible in part by a $350,000 gift by close friend, Anthony Edwards.

His love of writing and illustrating led to his being accepted at the Rhode Island School of Design.