Kathryn Elizabeth Hamm (born June 2, 1969) is an American author and businesswoman who has served as the chief operating officer of The Cook Political Report with Amy Walter since 2021. Prior to joining Cook, Hamm had a successful career in the wedding industry. She was the publisher of GayWeddings until its acquisition by WeddingWire in 2015. She also co-authored The New Art of Capturing Love (2014), a photographic guide to same-sex weddings.