Wormleybury is an 18th-century house surrounded by a landscaped park of 57 ha near Wormley in Broxbourne, Hertfordshire, England, a few miles north of Greater London. The house was rebuilt in the 1770s from an earlier house built in 1734. The house is a Grade I listed building. The garden is well known for its historic rare plant collection. There is a crescent shaped lake in the grounds, bordered by woods on three sides.

Wormley is a village and former civil parish, lying between Hoddesdon and Cheshunt in the Broxbourne district, in the county of Hertfordshire, England. The village is part of the ward of Wormley and Turnford, which had a population of 8,146 at the 2001 census. In 1931 the parish had a population of 930. The parish was abolished in 1935 and absorbed into Hoddesdon.