Krumbach is a town with 13,000 residents in the district Günzburg in Swabia, Bavaria, Germany. It is the second biggest town in the distric…Krumbach is a town with 13,000 residents in the district Günzburg in Swabia, Bavaria, Germany. It is the second biggest town in the district. Krumbach is situated in Mittelschwaben in the natural region Lower Iller-Lech Gravel Plateau in the valley of the Kammel, a left tributary of the Mindel river and so an indirect tributary of the Danube river. The landscape is marked by forests and areas in agricultural acreage.