Gossard is a Nottingham-based brand and manufacturer of women's undergarments and hosiery. Founded in the early 20th century in Chicago as H. W. Gossard Co., it expanded quickly, flourishing in the 1920s. As Associated Apparel Industries, Inc. it held a central position in its market in the 1930s. Amalgamated eventually succumbed to the poor economy in the United States during the Great Depression, but Gossard continues as a division of Courtaulds in Great Britain.

Gossard was established as H. W. Gossard Co. in Chicago in 1901, per company history, after its founder Henry Williamson Gossard was inspired by a corset worn at a Paris performance by the actress Sarah Bernhardt. In this performance of the play L'Aiglon, she played the role of a boy, and wore a made to measure corset. H. W. Gossard decided to import the concept to America and market it. In the 1920s it introduced the idea of putting corset ties on the front, allowing the wearer to untie them herself. The company advertised extensively under the slogan "The Gossard Line of Beauty." In 1928 the company was reorganized as a division of Associated Apparel Industries, Inc. The manufacturer became a conglomerate after acquiring Venus Company and Lamode Garment Company, adding $3,000,000 in annual revenue. Associated Apparel, Inc., planned to build a plant in Germany, and its president, R. C. Stirton, sailed for Europe in May 1929 to facilitate this.

Stockholders of Nature's Rival Company, a firm previously acquired by Associated Apparel, Inc., brought a bankruptcy petition against Amalgamated in September 1933. The suit was filed in the United States District Court in Chicago. It asked for a sum of $1,232,500.

After the bankruptcy, the company reformed as H. W. Gossard but became a British company. It continued to manufacture women's underwear and hosiery, and R. C. Stirton continued as its president until his death in 1945. During the Second World War, Gossard produced parachutes, sails, and bras for women of the English navy.

Gossard was acquired by Courtaulds Textile Group in 1959. At some point it became a property of the French DBApparel, but was reacquired by Courtaulds in 2007.

The book Gossard Girls was written by Phyllis Michael Wong about Gossard factory life in Upper Peninsular, Michigan in 1920-1970s.

In the 1960s Gossard produced a wide range of bras and corsets and pioneered the panty-girdle. In the 1970s Gossard introduced Glossies, a brand designed for a transparent and iridescent appearance. Gossard developed larger sizes of Glossies in DD. In the 1980s, Gossard introduced the Ritz collection with matched colours.

In 1994 the Hello Boys advertising campaign for Gossards Wonderbra featuring model Eva Herzigová was voted "the greatest poster of all time" in 2011.