Mary Rebecca Whipple is an American coxswain famous for winning a gold medal in women's eight at the 2012 Summer Olympics and at the 2008 Summer Olympics. She also competed at the 2004 Summer Olympics where she won a silver medal. As a coxswain, Whipple stands 5 ft 3 in (1.60 m) and weighs in at 108 lb (49 kg).