Margaret Hillert (1920-) is an American author and poet. Hillert is known primarily for her children's literature, having written over eighty books for beginning readers. A retired first grade teacher, she currently resides in southeast Michigan. Hillert is best known for her popular Dear Dragon series, which pairs tales of a young boy and his pet dragon with instructional notes, word lists, and activities to promote reading skills. Hillert's work has been illustrated by Ed Young, Nan Brooks, Kelly Oechsli, Kinuko Y. Craft, and Dick Martin.