Boroughbridge was a parliamentary borough from medieval times, electing two Members of Parliament to the unreformed Commons. It had a "burgage" franchise, meaning that the right to vote was tied to ownership of certain pieces of property in the borough, and it had less than 100 qualified voters by the time it was abolished in the Reform Act of 1832: It was a pocket borough entirely under the control of the Dukes of Newcastle. Augustus FitzRoy, who was later Prime Minister as the 3rd Duke of Grafton, was elected MP for Boroughbridge in 1756; however, he never sat for the borough as he preferred to represent Bury St Edmunds where he had also been elected.
In the days of stagecoaches, Boroughbridge was an important stage, thanks to its position on the Great North Road midway between London and Edinburgh. An advertisement in the Edinburgh Courant for 1754 reads:
The Edinburgh Stage-coach, for the better accommodation of passengers, will be altered to a New Genteel Two-end Glass Coach Machine, being on steel springs, exceeding light and easy, to go in ten days in Summer and twelve in Winter; to set out the first Tuesday in March, and continue it, from Hosea Eastgate's, the Coach and Horses, in Dean-Street, Soho, London; and from John Somerville's, in the Canongate, Edinburgh, every other Tuesday, and meet at Burrow-Bridge on Saturday night, and set out from thence on Monday morning, and get to London and Edinburgh on Friday. In Winter, to set out from London to Edinburgh every other (alternate) Monday morning, and to go to Burrowbridge on Saturday night; and to set out from thence on Monday morning, and get to London and Edinburgh on Saturday night. Passengers to pay as usual. Performed, if God permits, by your dutiful servant HOSEA EASTGATE.
In 1945 the A1 bridge over the River Ure collapsed under the weight of a heavy transport vehicle carrying an 80-ton steel mill roll housing from Sheffield to Falkirk. That interrupted a main transport route only for a short while, the Army installing a Bailey bridge until repairs were completed.
Close to Boroughbridge is the village of Aldborough, once the site of the Roman settlement Isurium Brigantum (SE406664). There is a small museum.