Karen Lende O'Connor (born February 17, 1958) is an American equestrian who competes in three-day eventing. Although she did not come from a family of equestrians, her interest in horses started at an early age, and she received her first horse for her 11th birthday. O'Connor began competing internationally in the late 1970s, and in 1986 began riding for the US national eventing team. Since then, she had ridden in five Olympic Games, three World Equestrian Games and two Pan-American Games, winning multiple medals, including a team silver at the 1996 Olympic Games and a team bronze at the 2000 Olympic Games. She has also posted numerous wins and top-10 finishes at other international events. As of 2013, O'Connor is not competing, having suffered fractures to two thoracic vertebrae during a fall at a competition in October 2012.