Molsheim is a commune and a subprefecture in the Bas-Rhin department in Grand Est in north-eastern France. The total population in 2017 was 9,312. Molsheim had been a very fast-growing city between the French censuses of 1968 and 1999, passing from 5,739 to 9,335 inhabitants, but this increase came to a noticeable halt since. The urban unit of Molsheim had 26,925 inhabitants in 2017, from 16,888 in 1968. Molsheim is part of the metropolitan area of Strasbourg.

Bas-Rhin is a département in Alsace which is a part of the Grand Est super-region of France. The name means 'Lower Rhine', referring to its lower altitude among the two French Rhine departments: it is downstream of the Haut-Rhin department. Both belong to the European Upper Rhine region. It is, with the Haut-Rhin, one of the two departments of the traditional Alsace region which until 1871, also included the area now known as the Territoire de Belfort. The more populous and densely populated of the pair, it had 1,152,662 inhabitants in 2021. The prefecture is based in Strasbourg. The INSEE and Post Code is 67.