Lexilip (Irish: Léim an Bhradáin, meaning 'Salmon's leap') is a civil parish and a townland located in the north-eastern corner of County Kildare, Ireland. The civil parish is mainly in the ancient barony of Salt North with a small part in the neighbouring barony of Newcastle. It is centred on the town of Leixlip. In geology, the parish rests on a substratum of limestone, and contains chalybeate springs. It lies at the confluence of the River Liffey and the Rye Water.