Burgess Hill is a town and civil parish in West Sussex, England, close to the border with East Sussex, on the edge of the South Downs National Park, 39 mi (63 km) south of London, 10 mi (16 km) north of Brighton and Hove, and 29 mi (47 km) northeast of the county town, Chichester. It had an area of 3.7 sq mi (9.6 km2) and a population of 30,635 at the 2011 Census, making it the fourth most populous parish in the county and the most populous in the Mid Sussex District. Other nearby towns include Haywards Heath to the northeast and Lewes, the county town of East Sussex, to the southeast.

West Sussex is a ceremonial county in South East England. It is bordered by Surrey to the north, East Sussex to the east, the English Channel to the south, and Hampshire to the west. The largest settlement is Crawley, and the county town is the city of Chichester.