Roo Powell (born March 30, 1983) is an American writer and advocate. She was born in Hong Kong, the daughter of Gareth Powell. She is the founder of SOSA, a nonprofit organization focused on the prevention of online child sex abuse and exploitation. In October 2021, it was announced that she and SOSA would be featured in a six-part docuseries, Undercover Underage, which debuted in November 2021 on Discovery+; Season 2 premiered on May 1, 2023.