The River Quin is a small watercourse which rises near Barkway in north east Hertfordshire, England. The river is fed by a number of sources including springs from Biggin Moor, Great Hormead Brook, Little Hormead Brook and various field ditches, including the Braughing Bourne - the site of a former glacier from the Ice Age. It flows south, close to the B1368 road to the southwest of Braughing where it joins the River Rib at Gatesbury. This area was the site of a former Roman settlement.