Beaconsfield (pronounced [bekənzfiːld]) is a market town in Buckinghamshire, England lying almost 25 miles NW of London. The town sits in the Chiltern Hills Area of Outstanding Natural Beauty and is part of the London commuter belt, thus the average cost of housing in the town is high. It is in the South Bucks local government district, which was known as the Beaconsfield district from 1974 to 1980.