Cathy O'Neil is an American mathematician, data scientist, and author. She is the founder of the blog mathbabe.org and has written books on data science, including the New York Times best-seller Weapons of Math Destruction, which is an influential source for the Human-Centered Artificial Intelligence community.

Her opinion columns are published in Bloomberg View. She is a former Director of the Lede Program in Data Practices at Columbia University Graduate School of Journalism’s Tow Center.