Royal Border Bridge spans the River Tweed between Berwick-upon-Tweed and Tweedmouth in Northumberland, England.
The bridge is a Grade I listed railway viaduct built between 1847 and 1850, when it was opened by Queen Victoria.
It was designed by Robert Stephenson and built for the York, Newcastle and Berwick Railway and is still in regular use today, as part of the East Coast Main Line.
The bridge is 659 metres long. It has 28 arches, constructed of brick but aesthetically faced with stone. The bridge is 38 metres above the river itself.
In the 1990s it underwent significant repair work for the first time, in a Railtrack project with some funding from English Heritage.