Berwick-upon-Tweed (/ˌbɛrɪk-/ ^ⓘ) is a parliamentary constituency^{[n 1]} in Northumberland represented in the House of Commons of the UK Parliament since 2015 by Anne-Marie Trevelyan, a Conservative.^{[n 2]}

It was a parliamentary borough in the county of Northumberland of the House of Commons of England from 1512 to 1706, then of the House of Commons of Great Britain from 1707 to 1800 and of the House of Commons of the United Kingdom from 1801 to 1885. It returned two Members of Parliament (MPs), elected by the bloc vote system.

It has been a county constituency since 1885, electing one MP under the first-past-the-post system.

Further to the completion of the 2023 Periodic Review of Westminster constituencies, the seat will be expanded to include the town of Morpeth from the (to be abolished) constituency of Wansbeck. Accordingly, it will renamed North Northumberland.^[3]

The constituency of Berwick-upon-Tweed is in the county of Northumberland. It includes as its northernmost point the town of Berwick-upon-Tweed and stretches south to include the towns of Alnwick and Amble — the Northumberland coast forms its long eastern boundary. Its length is roughly 50 miles (80 km) and its area is 2,310 square kilometres.

Predominantly rural in character, this constituency is the most northerly in England and is relatively sparsely populated.

Berwick had been intermittently represented in Scottish Parliaments but it is thought that it was first enfranchised as an English borough between 1491 and 1512.^[4]

It was unaffected by the Reform Act 1832 and continued to elect two MPs until it was abolished by the Redistribution of Seats Act 1885. The 1885 Act re-constituted the constituency as one of four divisions of Northumberland, each electing one MP.

Rural in nature, sparse of population and with agriculture as a major source of employment, Berwick-upon-Tweed has never elected a Labour candidate, one of two constituencies in the north east of England not to have done so. The closest Labour have ever come to winning the seat was at the 1966 general election, where they finished just 4,373 votes behind incumbent Conservative MP Antony Lambton.

The area has been notable for its Liberal politicians – both Sir William Beveridge (influential in the formation of the National Health Service) and Edward Grey (Foreign Secretary at the beginning of World War I, best remembered for the "lamps are going out all over Europe...." remark) have served this constituency.

It was represented by Liberal Democrat Sir Alan Beith from 1973 (formerly Liberal) until his retirement in 2015, when it was gained by the Conservative candidate Anne-Marie Trevelyan. Beith was first elected at a by-election, required as a result of the resignation of the then incumbent MP Antony Lambton (Conservative), who had been caught up in a scandal involving call girls, marijuana and a tabloid newspaper.

In 1923, Mabel Philipson, a former music hall actress, took over the seat as a Conservative, when her husband was forced to resign. In doing so she became only the third female MP to sit in the House of Commons since female members became legal five years previously.

The seat has sent members to Parliament since its enfranchisement by Henry VIII. It initially sent two members; this was reduced to one in 1885.

This list is incomplete; you can help by adding missing items. (August 2008)

• List of parliamentary constituencies in Northumberland
• History of parliamentary constituencies and boundaries in Northumberland