A girdle is a garment that encircles the lower torso, perhaps extending below the hips, and worn often for support. The word girdle originally meant a belt. In modern English, the term girdle is most commonly used for a form of women's foundation wear that replaced the corset in popularity. In sports, a girdle may be similar to compression shorts.

Historically and in anthropology, the girdle can be a scanty belt-shaped textile for men and/or women, worn on its own, not holding a larger garment in place, and less revealing than the loin-cloth, as was used by Minoan pugilists.

Constructed of elasticized fabric and sometimes fastened with hook and eye closures, the modern girdle is designed to enhance a woman's figure. Most open-bottom girdles extend from the waist to the upper thighs. In the 1960s, these models fell from favor and were to a great extent replaced by the panty girdle. The panty girdle resembles a tight pair of athletic shorts. Both models of girdles usually include suspender clips to hold up stockings.