The Swabian League (Schwäbischer Bund) is a mutual defense and peace keeping association of Imperial Estates—Free Imperial cities, prelates, principalities and knights—principally in the territory of the Early Medieval stem duchy of Swabia, established in 1488 at the behest of Emperor Frederick III of Habsburg and supported as well by Bertold von Henneberg-Römhild, archbishop of Mainz, whose conciliar rather than monarchic view of the Reich often puts him at odds with Frederick's successor Maximilian.

The Swabian League cooperates towards the keeping of the imperial peace and at least in the beginning curbing the expansionist Bavarian dukes from the House of Wittelsbach and the revolutionary threat from the south in the form of the Swiss.

The League holds regular meetings, supports tribunals and maintains a unified force of twelve thousand infantrymen and twelve hundred cavalry.