Beaconsfield is a market town and civil parish operating as a town council within South Bucks district in Buckinghamshire, England. It lies 25 miles (40 km) northwest of London, and 17 miles (27 km) south-east of the county town of Aylesbury. Nearby towns include Amersham to the north northeast and High Wycombe to the west.

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.