Oskava is a river in the Olomouc Region of the Czech Republic, left tributary of the Morava river. Its length is 50.4 km and its drainage basin covers 571.8 km2. The mean annual discharge at its mouth is 3.53 m3/s.
The Oskava originates from southeast slope of Kamenná hora in Hrubý Jeseník, 215 meters above sea level.
The river is surrounded by woods in upper reaches, flows through hills of Nízký Jeseník in middle reaches and its lower reaches is situated in swampy floodplain of Litovelské Pomoraví Protected Landscape Area. The Oskava empties into Morava near Olomouc.