Lucan Bridge is a road bridge spanning the River Liffey in Lucan, County Dublin, Ireland. It joins Lucan's Main Street to the Lower Lucan Road, carrying traffic towards Clonsilla and the north, and the Strawberry Beds to the east. Designed by George Knowles, it was built in 1814. Constructed in collaboration with James Savage at a cost of more than £9,000, it replaced several previous bridges which had been carried away by floods.