The Lika is a river in Croatia which gives its name to the Lika region.It is 77 km long and it has a basin with an area of 1014 km2. Its average discharge at the measurement station in Bilaj (covering 225 km² of the basin) is 7.33 m³/s, and it can go completely dry.

It is known as a sinking river because at the end of its course, it flows into a series of ponors or swallow-holes