Kate Soper (born 1981) is a composer and vocalist, notable for her innovative treatment of the vocal mechanism. Her work as both a composer and performer explores the dramatic and affective qualities of the human voice, capitalizing on extended vocal and instrumental techniques. She was a recent Guggenheim Fellow as well as a 2012–13 fellow of the Radcliffe Institute for Advanced Study. She was a finalist for the 2017 Pulitzer Prize in Music for her chamber opera, Ipsa Dixit.