Balallan (Scottish Gaelic: Baile Ailein, Bail' Ailein), meaning "Allan's Town", is a crofting township on the Isle of Lewis, in the Outer Hebrides, Scotland. Balallan is within the parish of . The township has the distinction of being the longest village (4 miles or 6 kilometres from end to end) in Lewis, and also in northern Scotland. Straggled along the head of a long sea loch between and , it developed due to a mixture of crofting along the loch shore and fishing. It sits at the head of Loch Erisort. The village formerly had a police house, and currently houses a post office.