Kristin Marcell was born in Doylestown Township, Pennsylvania, and lives in Wrightstown, Pennsylvania. Marcell graduated from Council Rock High School in 1995. She earned a bachelor's degree in political science from Pennsylvania State University in 1999 and a master's degree in public policy from George Washington University in 2006. Marcell's career experience includes working as the communications director of the Federal Motor Carrier Safety Administration under former President George W. Bush. She has served as the vice chair of the Middle Bucks Institute of Technology's Executive Council.
