The River Croco is a small river in Cheshire in England. It starts as lowland field drainage west of Congleton, flows along the south edge of Holmes Chapel, and joins the River Dane at Middlewich. It is about 8 miles (13 km) long.

The River Dane is a tributary of the River Weaver that originates in the Peak District area of England. The name of the river is probably from the Old Welsh dafn, meaning a "drop or trickle", implying a slow-moving river.