Marcia Thornton Jones (born July 15, 1968) is an American writer of children's books, the author or co-author of more than 135 elementary chapter books, picture books, and mid-grade novels, including The Adventures of the Bailey School Kids series, among other works co-written with Debbie Dadey.
Jones was born in Joliet, Illinois. She has been an elementary school teacher of first and third grades, computer lab, writing and reading, and Gifted & Talented. She has been a full-time writer since 1990. Her books are published by Scholastic, Tor, Dutton (Penguin Group), Hyperion Press (Disney), and F&W. She lives in Lexington, Kentucky with her husband Stephen.