Nancy Vonderheide, later Nancy Kleinman, is a former World Champion archer who represented the United States. Vonderheide took up archery in 1959 after starting to date Marvin Kleinman, a partner at the legal firm she was working at, who was a keen archer. Within two years, she won the World Championships in Oslo as an unknown; she also set two new world records at the event. She went on to carry out a record breaking 16 competition unbeaten streak, before being upset at the 1963 Championships by compatriot Victoria Cook. She was not selected for the United States team for any future Championships.