Banagher Bridge, Stone bridge over River Shannon between County Offaly and County Galway, Ireland

Banagher Bridge is a six-arch masonry bridge carrying the R356 road over the River Shannon between Counties Offaly and Galway. Built in 1841–1843, it originally had an opening section, replaced by a permanent beam. The bridge was widened in 1971, when aluminium railings replaced stone parapets.

An earlier bridge with seventeen arches stood on this site from 1685 until the early 1840s, when it was replaced by the current structure built by the Shannon Navigation Commissioners. The new bridge was part of a larger navigation improvement project for the River Shannon.

The bridge marks a traditional meeting point between eastern and western Ireland, linking communities from County Offaly and County Galway across the Shannon. It shapes how people from both sides experience crossing between the provinces in their daily movement.

The bridge is located on the R356 road and offers straightforward access on foot or by vehicle. Visitors can explore the area around the older bridge structure and visit Cromwell's Castle nearby.

The abutment of the 1685 bridge, blown up with gunpowder by Royal Engineers in 1843, still stands beside Cromwell's Castle on the Connacht bank. The bridge was called Sarsfield's Bridge after Patrick Sarsfield used it to retreat to Connacht following his ambush at Ballyneety.