The Świder is an approx. 90 km long tributary of the Vistula, in the eastern Poland in the voivodships Lublin and Mazovia. It is very popular with canoeists and anglers.
Run
The Świder rises on the Żelechów- plateau at Stoczek Łukowski and flows westward to the Vistula, where it is between Józefów and Otwock flows out.