The Wilga is a river of 67 km in eastern Poland south of Warsaw and lies in Garwolin County. It is a tributary of the Vistula.
The Wilga should not be confused with another right tributary of the Vistula, the Wilga River, which joins the Vistula upstream in urban Kraków.
Changes in land development in Wilga River valley since 1980 has influenced advantageously the present condition of the water environment. The heavy metal concentration in the sediments on the river bed have decreased dramatically.
Coordinates: 51°50′14″N 21°21′22″E / 51.837335°N 21.356180°E / 51.837335; 21.356180