David DeFazio (born July 19, 1983 in Red Bank, New Jersey, U.S.) is an American ice dancer who currently represents Switzerland in international competition. He previously represented Canada. He competed with Laura Csumrik and Ariane Morin, both representing Canada. He teamed up with Switzerland's Nora von Bergen in 2006. Von Bergen and DeFazio are the 2007 Swiss national champions. They split up after European Championships 2007.