Molly Brigid O'Bryan Vandemoer (born April 13, 1979) is an American sailor who competed in the 2012 Summer Olympics in the Elliott 6m class with Anna Tunnicliffe and Deborah Capozzi coming 5th overall. With Tunnicliffe and Capozzi, she also won the World title in 2011 and came second in 2012. She also won, with Anna Tunnicliffe, the Women's Snipe World Championships in 2010. She is currently the director of the Peninsula Youth Sailing Foundation (PYSF).