Nancy Chaffee Whittaker was an American female tennis player who was active in the 1950s.
Chaffee won the national girls' 18-and-under title in 1947. She won the U.S. National Indoor Championship, played at the Seventh Regiment Armory in Manhattan, from 1950 to 1952, defeating Althea Gibson, Beverly Baker and Patricia Todd in the finals. Chaffee reached the semifinals of the 1950 U.S. Championships as an unseeded player but was beaten in three sets by Margaret Osborne duPont. She reached No. 4 world ranking in 1951.
Her best performance at a Grand Slam tournament came in 1951 when, partnered with Patricia Todd, she reached the final of the doubles competition at the U.S. Championships. They were defeated in the final in two straight sets by Shirley Fry and Doris Hart. In 1951 she was selected for the U.S. Wightman Cup team and won her doubles match, contributing to a 6–1 victory against Great Britain.
In 1951 she married baseball star Ralph Kiner with whom she had three children. She was later married to sportscaster Jack Whittaker.