The Military Administration in Belgium and Northern France (German: Militärverwaltung in Belgien und Nordfrankreich) was an interim occupation authority established during the Second World War by Nazi Germany that included present-day Belgium and the French departments of Nord and Pas-de-Calais.

[1] The administration was also responsible for governing the zone interdite, a narrow strip of territory running along the French northern and eastern borders.

In Northern France, Flemish separatist tendencies were stirred by the pro-Nazi Vlaamsch Verbond van Frankrijk led by priest Jean-Marie Gantois.

[7] Ultimately, the attachment was based on Hitler's intention to move the Reich's border westward, and was also used to maintain pressure on the Vichy regime – which protested the curtailment of its authority in what was still de jure national French territory – to ensure its good behavior.

[8] The Military Administration formed the core of a wider command structure which allowed the governance of occupied Belgium.