Berwick-upon-Tweed, sometimes known as Berwick-on-Tweed or simply Berwick, is a town and civil parish in Northumberland, England. Located 2+1⁄2 miles south of the Anglo-Scottish border, it is the northernmost town in England. The 2011 United Kingdom census recorded Berwick's population as 12,043.
The town is situated at the mouth of the River Tweed on the east coast, approximately 56 mi east-south east of Edinburgh, 65 mi north of Newcastle upon Tyne, and 345 mi north of London. Uniquely for England, the town is located slightly further north than Denmark's capital Copenhagen and the southern tip of Sweden further east of the North Sea, which Berwick borders.
Berwick was founded as an Anglo-Saxon settlement during the time of the Kingdom of Northumbria, which was annexed by England in the 10th century. A civil parish and town council were formed in 2008 comprising the communities of Berwick, Spittal and Tweedmouth. It is the northernmost civil parish in England.
The area was for more than 400 years central to historic border wars between the Kingdoms of England and Scotland, and several times possession of Berwick changed hands between the two kingdoms.