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The River Anker is a tributary of the River Tame, which it joins near the castle in Tamworth.
The River Anker rises south-east of Wolvey, and flows north-west past Bramcote, and through Nuneaton, where it has caused serious flooding on many occasions. It continues north-west, passing by Atherstone to the north, then on to Polesworth.
North-west of Polesworth, the river widens into several large shallow lakes, caused by mining subsidence. Most notable are seen in the nature reserve at Alvecote Pools, a Site of Special Scientific Interest (SSSI). From here the river meanders westwards its confluence with the River Tame in Tamworth.

The River Anker is 31 miles (50km) in length.