Buckfastleigh is a market town and civil parish in Devon, England situated beside the Devon Expressway (A38) at the edge of the Dartmoor National Park. It is part of Teignbridge and, for ecclesiastical purposes, lies within the Totnes Deanery. It is 18 miles east-northeast of Plymouth, 20 miles southwest of Exeter and has a population of 3,661. It is a centre of tourism and is home to Buckfast Abbey, the South Devon Railway, the Buckfastleigh Butterfly Farm and Otter Sanctuary, the Tomb of Squire Richard Cabell and The Valiant Soldier.

The A38, parts of which are known as Devon Expressway, Bristol Road and Gloucester Road, is a major A-class trunk road in England.