O'Connell Bridge is a road bridge spanning the River Liffey in Dublin, Ireland, which joins O'Connell Street to D'Olier Street, Westmoreland Street and the south quays.

The River Liffey is a river in eastern Ireland that ultimately flows through the centre of Dublin to its mouth within Dublin Bay. Its major tributaries include the River Dodder, the River Poddle and the River Camac. The river supplies much of Dublin's water and supports a range of recreational activities.