Datchet Bridge, also known as The Divided Bridge, was a road bridge which crossed the River Thames at Datchet from 1706 until it was demolished in 1848. It was situated on the reach between Old Windsor Lock and Romney Lock and linked Windsor on the Berkshire bank to Datchet on the Buckinghamshire side. The bridge replaced a ferry service which had operated at the site since at least the middle of the 13th century.
The first Datchet Bridge was a wooden bridge commissioned by Queen Anne as the crossing was a convenient back-way to Windsor Castle. Responsibility for the upkeep and maintenance of the crossing later passed to the counties of Berkshire and Buckinghamshire over whose boundary the bridge spanned. There followed many decades of dispute between the counties over who should pay for what. This culminated in 1836 with each county deciding to build their own half, in different materials and not touching in the middle. The resulting "crazy erection", Buckinghamshire's side in wood and Berkshire's in iron, known as The Divided Bridge, was demolished in 1848 and is the only case on the Thames where an established bridge crossing site has completely disappeared.