The Reichsgau Wallonia (German: Reichsgau Wallonien; French: Gau du Reich Wallonie) was a short-lived Reichsgau of Nazi Germany established in 1944. It encompassed present-day Wallonia in its old provincial borders, excluding Comines-Warneton but including Voeren. Eupen-Malmedy and Moresnet were also omitted, both of which had already been incorporated into Germany after its victory in the Battle of France in 1940.