Cahoon received his BFA from NYU's Tisch School of the Arts. As an actor on Broadway, Cahoon originated the roles of Ed the Hyena in The Lion King, George in The Wedding Singer, The Childcatcher in Chitty Chitty Bang Bang, numerous roles in the revival of The Rocky Horror Show, making his Broadway debut in The Who's Tommy.
Off-Broadway credits include the title role of Hedwig in Hedwig and the Angry Inch (also Boston, San Francisco, The Edinburgh Festival), The Wild Party at Manhattan Theatre Club, the Roundabout's revival of The Foreigner, for which he received a Lucille Lortel Award nomination,The Shaggs: Philosophy of the World at Playwright's Horizon and the revival of Paula Vogel's How I Learned to Drive at Second Stage. For NY's Encores! Series, he was seen as Woof in Hair and Peter in Babes in Arms. He has performed regionally at The Berkshire Theatre Festival, NY Stage and Film, The Guthrie, and The Williamstown Theatre Festival, among others.
On television, Kevin has been seen The Good Wife, Nurse Jackie, Black Box, The Mentalist, CSI, Modern Family, Franklin and Bash, NCIS, Canterbury's Law, Six Degrees, The Royale, Hope and Faith, Ed, Law and Order, and Law and Order: Criminal Intent. On film he can be seen in Gus Van Sant's I Am Michael, Disney's Mars Needs Moms, Woody Allen's The Curse of the Jade Scorpion, Paul Reiser's The Thing About My Folks, Adrienne Shelley's Sudden Manhattan, One Night, and the documentary, Whether You Like It Or Not: The True Story of Hedwig.
His debut album Doll, from his band Kevin Cahoon and Ghetto Cowboy, received The Out Music Award for Outstanding Debut Recording, a Citation of Merit from Billboard Magazine's World Songwriters Awards, and The Pabst Blue Ribbon Live & Local Award for NYC. .
As a director, Kevin has worked extensively with the Ars Nova Theatre in NYC, directing Toe Pick! The True Ice Capades of Nancy Kerrigan and Tonya Harding, Grifftopia, and Tastiskank, which went on to win the Aspen Comedy Festival.
Cahoon has been both profiled in media outlets, such as The New York Times, Time Out New York, Paper Magazine, Gotham Magazine's 'It List', The San Francisco Chronicle, The Houston Chronicle, and The Scotsman in Edinburgh.