Helen Sandy Pflueger is an American equestrian. She has competed successfully in both eventing and dressage, finishing second at the Badminton Horse Trials in 1981 and competing on the United States Dressage Team at the 1984 Los Angeles Olympics. She competed under the British flag at the World Equestrian Games in Rome 1998 and Aachen in 2006 and the European Championships in Arnheim 1998.