The women's 57 kg (also known as lightweight) tournament in the judo at the 2008 Summer Olympics was held on August 11 at the Beijing Science and Technology University Gymnasium.

A total of 22 women competed in this event, limited to jūdōka with a body weight of less than 57 kilograms.

This event was the third-lightest of the women's judo weight classes, limiting competitors to a maximum of 57 kilograms of body mass.

The two judokas who lost in the semifinals faced the winner of the opposite half of the bracket's repechage in bronze medal bouts.

Those judoka eliminated in earlier rounds by the four semifinalists of the main bracket advanced to the repechage.