Radstock is a town and civil parish on the northern slope of the Mendip Hills in Somerset, England, about 9 miles south-west of Bath and 8 miles north-west of Frome. It is within the area of the unitary authority of Bath and North East Somerset. The Radstock built-up area had a population of 9,419 at the 2011 Census. Radstock has been settled since the Iron Age, and its importance grew after the construction of the Fosse Way, a Roman road.