Loch Voil is a small freshwater loch in Scotland. It is a short, narrow loch approximately 5 km in length. It is separated from Loch Doine by fluvial deposits from the Monachyle Burn and is drained at its eastern end by the River Balvag at Balquhidder. The Loch can be reached by a small single track road from Balquhidder leading to Inverlochlarig.