Burgess Hill is a civil parish and a town primarily located in the Mid Sussex district of West Sussex, England, close to the border with East Sussex, on the edge of the South Downs National Park. Located 62 km (39 mi) south of London, 16 km (9.9 mi) north of Brighton and Hove, and 47 km (29 mi) east-northeast of the county town of Chichester, it occupies an area of 9.47 km2 (3.66 sq mi) and had a population of 30,635 at the time of the 2011 Census, making it the fourth most populous parish in the county (behind Crawley, Worthing and Horsham) and the most populous in the district. Other nearby towns include Haywards Heath to the north east and Lewes, the county town of East Sussex, to the south east.