Drumsurn (from Irish Droim Sorn 'furnace ridge')[1] is a small village and townland in County Londonderry, Northern Ireland.
It lies in the Roe Valley, at the foot of Donald's Hill and at the edge of the Sperrins.
Drumsurn had a population of 357 people in the 2001 Census.
It is situated within Causeway Coast and Glens district.
During the Troubles, loyalist paramilitaries exploded a car bomb outside O’Connor's Supply House in the centre of the village on 26 July 1973.