Jessica Valenti (; born November 1, 1978) is an American feminist writer. She was the co-founder of the blog Feministing, which she wrote for from 2004 to 2011. Valenti is the author of six books: Full Frontal Feminism (2007), He's a Stud, She's a Slut (2008), The Purity Myth (2009), Why Have Kids? (2012), Sex Object: A Memoir (2016), and Abortion: Our Bodies, Their Lies, and the Truths We Use to Win (2024). She also co-edited the books Yes Means Yes: Visions of Female Sexual Power and A World Without Rape (2008), Believe Me: How Trusting Women Can Change the World (2020). Between 2014 and 2018, Valenti was a columnist for The Guardian. She currently runs the Abortion, Every Day newsletter on Substack. The Washington Post described her as "one of the most successful and visible feminists of her generation".