Mary Jayne Harrelson (married name Reeves; born June 17, 1978, in Roxboro, North Carolina) is a female middle distance runner from the United States.

She become one of the most accomplished athletes in SoCon history, winning 23 individual championships.

In 1999 and 2001, Harrelson was the 1500 meters national champion at the NCAA outdoor track & field championships.

In cross country, Harrelson was a conference champion three straight years (1998–2000) and qualified for the NCAA championships each of those seasons.

This biographical article about an American middle distance runner is a stub.