River Don, river in Aberdeenshire, northeastern Scotland, rising in the Grampian Mountains, flowing generally eastward parallel to and north of the River Dee, and emptying into the North Sea at Aberdeen after a course of 82 miles (132 km). In its upper course it receives a number of short mountain streams, but in its lower stretches it flows more gently through a lowland area of agriculture and livestock raising. The main river town above Aberdeen is Inverurie.