Sadie Rose Weilerstein (born July 28, 1894 – June 23, 1993) was an American author of children's literature.
Her works include What the Moon Brought and a series of stories featuring K'Tonton, a boy the size of a thumb who has adventures which feature Jewish holidays and culture.
The K'Tonton stories "exemplified both Conservative Jewish and broadly humanistic values." Throughout her life, she was a Zionist, advocating for a Jewish homeland, and an environmentalist.