Ballylesson (from Irish: Baile na Leasán, meaning "townland of the small ringforts") is a small village and townland in County Down, Northern Ireland. In the 2001 Census it had a population of 108 people. The village lies within the Lagan Valley Regional Park and the Lisburn City Council area.
The Giant’s Ring, a state care henge monument, is between Edenderry and Ballylesson.
Holy Trinity Church in Ballylesson is a listed building. It was built in 1788 and consecrated in 1789. It has a square tower at the west end with pinnacles at the corners of the tower.
Coordinates: 54°32′04″N 5°56′51″W / 54.53444°N 5.94750°W