Corsham is a historic market town and civil parish in west Wiltshire, England. It is at the southwestern edge of the Cotswolds, just off the A4 national route. It is 28 miles southwest of Swindon, 20 miles east of Bristol, 8 miles north-east of Bath, and 4 miles southwest of Chippenham. Historically, Corsham was a centre for agriculture and later, the wool industry, and remains a focus for quarrying Bath Stone.