Unterstadion is a municipality situated in the district of Alb-Donau within the German state of Baden-Württemberg. The town is located approximately 74 kilometres (46 miles) south of Stuttgart, which serves as the state capital.
As a local administrative area, Unterstadion functions as part of the regional infrastructure of the Alb-Donau district. It maintains its distinct municipal status while being positioned within the broader geographical landscape of southwestern Germany.