Sinikka Marianna Nopola (26 November 1953 – 13 January 2021) was a Finnish children's writer. She published 80 books from 1987 until her death. Nopola's popular series were series "Hayflower and Quiltshoe" and "Ricky Rapper". Nopola was born in Helsinki. She worked as a journalist for the newspaper "Helsingin Sanomat".