Ilen may refer to:
River Ilen, County Cork, Ireland Ilen Rovers GAA, a Gaelic football club in County Cork, Ireland Ilen School and Network for Wooden Boat Building, a charity in Limerick, Ireland A. K. Ilen (Auxiliary Ketch Ilen), an Irish ship Embet Ilen (c. 1801–1851), Eritrean politician Ilen Church, a church in Trondheim, Norway