Aberfoyle (Scottish Gaelic: Obar Phuill) is a village in the historic county and registration county of Perthshire and the council area of Stirling, Scotland.
The town is situated on the River Forth. Since 1885, when the Duke of Montrose constructed a road over the eastern shoulder of Craigmore to join the older road at the entrance of the Trossachs pass, Aberfoyle has become the alternative route to the Trossachs and Loch Katrine; this road, known as the Duke's Road or Duke's Pass, was opened to the public in 1931 when the Forestry Commission acquired the land.
Loch Ard, about two miles (3 km) west of Aberfoyle. Towards the west end is Eilean Gorm (the green isle), and near the north-western shore are the falls of Ledard. The loch's northern shores are dominated by the mountain ridge of Beinn an Fhogharaidh. It drains by the Avon Dhu to Loch Ard, which is drained in turn by the Forth. In the past Aberfoyle was spelt alternatively as "Aberfoil".
The slate quarries on Craigmore which operated from the 1820s to the 1950s are now defunct; at its peak this was a major industry. Other industries included an ironworks, established in the 1720s, as well as wool spinning and a lint mill.
From 1882 the village was served by Aberfoyle railway station, the terminus of the Strathendrick and Aberfoyle Railway which connected to Glasgow via Dumbarton or Kirkintilloch The station closed to passenger traffic in 1951, and the remaining freight services ceased in 1959.
The above industries have since died out, and Aberfoyle is supported mainly by the forestry, industry and tourism.