Ostwald (French pronunciation: [ɔstvald] ⓘ; Alsatian: Oschwold) is a commune in the Bas-Rhin department in Grand Est in north-eastern France.

In the time of the emperor Frederick I Barbarossa, within the realm of the Holy Roman Empire, the Hohenstaufens built a castle by the Ill River.

In 1285, the city was acquired by the Zorn family of Strasbourg and took the name of Illwickersheim, also sometimes called Sankt Ostwald after the name of a parish.

The act of annexation of Alsace to the kingdom of France took place in Illkirch in 1681, after which Illwickersheim experienced a period of peace and prosperity, with the introduction of potato farming, which saw an increase in the city's area and population.

The urban development of the 1960s and 1970s caused expansion to new neighborhoods such as Wihrel and the construction of facilities such as schools and daycare centers.