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 settlement lies 27 miles (43 kilometres) north of Glasgow.

The parish of Aberfoyle takes its name from this village, and had a population of 1,065 at the 2011 census.

The town is situated on the River Forth at the foot of Craigmore (387 m or 1,270 ft high). 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 2 miles (3 kilometres) west of Aberfoyle, lies 40 m (130 ft) above the sea. It is 3 mi (5 km) long (including the narrows at the east end) and 1 mi (1.5 km) broad. 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 (616 m or 2,021 ft). Two miles (three kilometres) northwest of Loch Ard is Loch Chon, at 90 m (300 ft) above the sea, 1+1⁄4 mi (2 km) long and about 1⁄2 mi (800 m) broad. It drains by the Avon Dhu to Loch Ard, which is drained in turn by the Forth.

Aberfoyle supposedly originates from the Brittonic Celtic, aber poll or aber phuill (Scottish Gaelic, Obar Phuill), meaning (place at the) mouth of the Phuill Burn (the Pow Burn enters the River Forth at Aberfoyle). Historically, alternative spellings such as Abirfull, Aberfule, Aberfoill and Aberfoil have been recorded before the current spelling became accepted by the 20th century. The river-name is from either Gaelic poll or Brittonic pol, both of which mean 'pool, sluggish water'.

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.