Berwick-upon-Tweed, sometimes known as Berwick-on-Tweed or simply Berwick, is a town and civil parish in Northumberland, England, 2+1⁄2 mi (4 km) south of the Anglo-Scottish border, and the northernmost town in England. The 2011 United Kingdom census recorded Berwick's population as 12,043.

Berwickshire or the County of Berwick is a historic county, registration county and lieutenancy area in south-eastern Scotland, on the English border. The county takes its name from Berwick-upon-Tweed, its original county town, which was part of Scotland at the time of the county's formation in the twelfth century, but became part of England in 1482 after several centuries of swapping back and forth between the two kingdoms. After the loss of Berwick, Duns and Greenlaw both served as county town at different periods.