Hellingly (/ˈhɛlɪŋlaɪ/ HELL-ing-lye) is a village, and can also refer to a civil parish, and to a district ward, in the Wealden District of East Sussex, England.

Hellingly contains the confluence of the River Cuckmere and one of its tributaries, the Bull River, close to the centre of the historic Hellingly village. The parish stands on the lower southern slopes of the gentle uplands forming the Weald.

The geographic centre of the parish is southeast of Old North Street and northwest of Church Lane, 2 miles (3.2 km) north of the town centre of Hailsham.

The village of Hellingly, the village of Lower Dicker, the village of Lower Horsebridge, the hamlet of Grove Hill, the suburbs of Roebuck Park and Carters Corner, are all entirely within the boundaries of the parish of Hellingly.

Liminal areas to the north of the village of Upper Dicker, to the east of the hamlet of Gun Hill, and to the south of the hamlet of North Corner, also fall within the boundaries of the parish of Hellingly.

The villages and settlements in the parish, like many others on the Weald, were involved in the Wealden iron industry.

The mill building is a Grade II* listed building and the associated miller's house is Grade II. Horselunges Manor is a moated Tudor manor house, originally built for the Devenish family and restored by Walter Godfrey in the 1930s, and is Grade I listed.

There are two NHS mental health sites within the parish of Hellingly, one is the Amberstone Hospital, a specialist rehabilitation unit to help people recover from long-term mental health issues, and the other site is the Hellingly Centre, a medium secure unit for people between the ages of 18 and 65 who have mental health problems and who have become involved with the criminal justice system. Both sites are managed by Sussex Partnership NHS Foundation Trust.