Mary Jane (née Sears) Parks (born May 10, 1939) is an American former competition swimmer and 1956 Olympic Bronze medalist.

1956 was the first year Butterfly was held as an individual Olympic event, with the American women taking all three medals.

[5] She also competed in the women's 200-meter breaststroke in the '56 Olympics, finishing seventh in the event final with a time of 2:57.2, which broke her own prior American National record set in the trials.

In the 1955 Pan American Games she took gold in the 4×100 metre medley swimming with Coralie O'Connor, Betty Mullen, and Wanda L. Werner, who was not an Olympian.

[6] In her 30's, Mary Jane continued to swim and train as a recreational competitive swimmer with the D.C. Masters, in the Potomac Valley, part of United States Master's Swimming from around 1972–1978, where she placed very well in her age group, including a number of national top ten finishes.