| Election Name: | 1944 Berwick-upon-Tweed by-election |
| Type: | parliamentary |
| Country: | United Kingdom |
| Ongoing: | no |
| Previous Election: | 1941 Berwick-upon-Tweed by-election |
| Previous Year: | 1941 |
| Next Election: | 1945 United Kingdom general election |
| Next Year: | 1945 |
| Election Date: | 17 October 1944 |
| Candidate1: | William Beveridge |
| Party1: | Liberal Party (UK) |
| Popular Vote1: | 8,792 |
| Percentage1: | 87.4% |
| Candidate2: | W.D. Clark |
| Party2: | Independent (politician) |
| Popular Vote2: | 1,269 |
| Percentage2: | 12.6% |
| MP | |
| Posttitle: | Subsequent MP |
| Before Party: | Liberal Party (UK) |
| After Party: | Liberal Party (UK) |
| Turnout: | 24.5% |
The 1944 Berwick-upon-Tweed by-election was a parliamentary by-election held on 17 October 1944 for the British House of Commons constituency of Berwick-upon-Tweed.
The seat had become vacant when the constituency's Member of Parliament (MP), George Charles Grey, was killed in action. Grey (2 December 1918 – 30 July 1944), the son of a major-general, had joined the British Army in 1938 before the outbreak of the Second World War the following year.
Grey had become the Liberal MP for the constituency, when he was returned unopposed at a by-election on 18 August 1941, to fill a vacancy caused by the elevation to the peerage of the previous Liberal MP.
Between his election and his death, he was the youngest member of the House of Commons, having been elected at the age of 22 years 259 days.
A captain in the 4th Battalion Grenadier Guards, Grey was killed at Le Repas in Normandy, France, on the first day of Operation Bluecoat. He was buried on the battlefield by his men, on the site of which his family later erected a memorial. The site is now recognised as a war grave, designated the Livry Isolated Grave.
The election took place during the Second World War. Under an agreement between the Conservative, Labour and Liberal parties; who were participating in a wartime coalition, the party holding a seat would not be opposed by the other two at a by-election. Accordingly, the Liberal Party nominated a candidate, but no Labour or Conservative representative was put forward.
Two candidates were nominated. The list below is set out in descending order of the number of votes received at the by-election.
1. The Liberal Party candidate was Sir William Henry Beveridge (5 March 1879 – 16 March 1963), who was a British economist and social reformer. He is perhaps best known for his 1942 report Social Insurance and Allied Services (known as the Beveridge Report[1]) which served as the basis for the post-World War II Labour government's Welfare State, including especially the National Health Service.
Beveridge was defeated by a Conservative candidate in the 1945 United Kingdom general election. He was created the 1st Baron Beveridge in 1946. 2. William.D. Clark, a local farmer, was an Independent candidate.[2]