Knocknakilla is the site of a megalithic complex (grid reference W297843) situated between Macroom and Millstreet, in County Cork, Ireland.

It is set in blanket peatland on the north-west upper slopes of Musherabeg mountain and is thought to be 3500 years old.

The mid-Cork area is rich in archaeological artifacts, and the surrounding townlands contain two cashels, a ringfort, two fulacht fiadh, a possible souterrain and a circular enclosure.

[2] The word Knocknakilla is derived from the Irish Cnoc na Cille, as 'The Hill of the Church'.

The site is located is on a level patch of bogland overlooking a deep valley and comprises a recumbent stone circle, a radial cairn and two pointy portal stones (one of which has fallen), aligned north-northeast to south-southwest.