Summerhill (Irish: Cnoc an LÃnsigh) is a heritage village in County Meath, Ireland. It is located in the south of the county, between Trim and Kilcock on the R158 and west of Dunboyne on the R156.
It is the site of one of the most important battles in 17th century Ireland, the Battle of Dungan's Hill. Up until 1667, the village was known in English as 'The Knock' or 'Lynchs' Knock' (phonetic renderings of Cnoc an LÃnsigh) as it was the ancestral home of the Norman-Irish Lynch family, whence came the Galway merchant family of the same name - one of the "Tribes of Galway". However, in about 1667, it was renamed Summerhill by the Langfords, the landed gentry, builders of Summerhill House and planners of the village as it is today.