Four Mile Bridge (Welsh: Pontrhydybont / Pont-rhydbont / Pontrhypont) is the name given to a bridge and the village surrounding it in Anglesey, Wales. They are so named because the bridge is around four miles by the old road (3 miles "as the crow flies") from Holyhead, the largest town in Anglesey and its surrounding islands. The bridge is one of three connecting the Anglesey mainland to the smaller Holy Island, where Holyhead is located.