Mary Murphy net worth: Mary Murphy is a champion ballroom dancer and judge who has a net worth of $10 million dollars. Born in Lancaster, Ohio, Mary Murphy graduated from Ohio University, where she earned a degree in physical education. After moving to Washington, D.C., she entered a program that trained ballroom dance instructors. A classically trained dancer already, she whizzed through the program and began teaching the next week. She was invited to attend the US Ballroom Championships and fell in love with ballroom. She moved to California to focus on training, and within in six months reached the US Open Standard Final with her partner, Bill Milner. She went on to reach the US Open Smooth Final with partner Jim Desmond. They subsequently became the US Open American Nine Dance Champions. She retired from competition and opened her own dance studio, which she still runs. She also judges multiple dance competitions around the world. Her most high-profile judging job is on the reality competition series, "So You Think You Can Dance", where she has served as a permanent judge since Season 3.