Cynthia Greiner (née Suggs; born February 15, 1957, in San Diego, California) is a retired female heptathlete and long jumper from the United States, who won the gold medal at the 1987 Pan American Games in Indianapolis, United States.

She is a two-time U.S. champion (1984 and 1990).

Greiner set her personal best (6300 points) in the heptathlon during the 1992 Summer Olympics in Barcelona, Spain.

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