The Shannon–Erne Waterway is a canal linking the River Shannon in the Republic of Ireland with the River Erne in Northern Ireland. Managed by Waterways Ireland, the canal is 63 km (39 mi) in length, has sixteen locks and runs from Leitrim village in County Leitrim to Upper Lough Erne in County Fermanagh.

The River Shannon is the major river on the island of Ireland, and at 360 km in length, is the longest river in the British Isles. It drains the Shannon River Basin, which has an area of 16,900 km2 (6,525 sq mi), – approximately one fifth of the area of Ireland.