Reeli Reinaus (born November 12, 1977) is a contemporary Estonian children’s writer.

Born in Keila, she graduated from the Tartu Academy of Theology, and received a master's degree in Estonian and comparative folklore from the University of Tartu. Reinaus has worked at the University of Tartu and currently works at the Estonian Literary Museum.

Reinaus has written over twenty works for children and young adults. They include short stories about everyday life, books that address common problems, crime novels, thrillers woven with the supernatural, and picture books for toddlers.