Margaret de Jesús Candelaria (born November 4, 1957, in Brooklyn, New York) is a retired female track and field athlete from Puerto Rico, who competed in the women's 400 metres during her career.

Her sole global competition appearance came at the 1984 Summer Olympics where she competed as part of the Puerto Rican women's 4x400 metres relay team.

[1] Her twin sister Madeline de Jesús also competed at the 1984 Summer Olympics, and won a number of international medals during her career as a long jumper.

[2] After Puerto Rico’s Madeline de Jesus came up lame while competing in the long jump, she was unable to run in the 4×400-meter relay at the 1984 Los Angeles Games.

Madeline enlisted her identical twin sister, Margaret, as an imposter for a qualifying heat.