The Rems is a right tributary of the Neckar in eastern Baden-Württemberg. It is 78 km long. Its source is in Essingen, near Aalen. It flows generally west through the towns Böbingen an der Rems, Schwäbisch Gmünd, Lorch (Württemberg), Plüderhausen, Schorndorf, Remshalden and Waiblingen.