Leixlip (/ˈliːkslɪp/ or /ˈliːslɪp/; Irish:Léim an Bhradáin) is a town in north-east County Kildare, Ireland. Its location on the confluence of the River Liffey and the Rye Water has marked it as a frontier town historically: on the border between the ancient kingdoms of Leinster and Brega, as an outpost of The Pale, and today on Kildare's border with Dublin.