The Tarnogród Confederation is a confederation of szlachta in Polish-Lithuanian Commonwealth, in the years 1715–1716.
It is formed on November 26, 1715 in Tarnogród by nobility angered by illegal taxation, levied for Saxon forces operating in Grand Duchy of Lithuania on behalf of Augustus II the Strong, who wants to introduce absolute monarchy in the Commonwealth.
Its marshal is Stanisław Ledóchowski.
The confederates and the royal forces do not fight any decisive battles, but they fight numerous smaller skirmishes; several towns and castles are taken.
The ensuing negotiations eventually bring Peter I of Russia and Russian Empire forces into the Commonwealth "for peacekeeping and mediation".
This event marks the beginning of lasting Russian Empire influence on Commonwealth internal affairs, starting with the Silent Sejm of 1717.
