Mary Decker Tabb
- Category : Sports-Track-and-Field
- Type : GP
- Profile : 5/1 - Heretical / Investigator
- Definition : Single
- Incarnation Cross : LAX Refinement 1
American track athlete.
During her career, she won gold medals in the 1500 meters and 3000 meters at the 1983 World Championships, and set 17 official and unofficial world records and 36 US national records.
Married twice, one child.