Drumsurn (from Irish Droim Sorn, meaning "furnace ridge") is a small village and townland in the Limavady Borough Council area of County Londonderry, Northern Ireland. It is 8 kilometres (5.0 mi) southeast of Limavady and 10 kilometres (6.2 mi) northeast of Dungiven. It lies in the Roe Valley, at the foot of Donald's Hill and at the edge of the Sperrins.