Berwick and Haddington was a constituency of the House of Commons of the Parliament of the United Kingdom from 1918, when it replaced the separate Berwickshire and Haddingtonshire constituencies, until it was renamed Berwick and East Lothian for the 1950 general election. It elected one Member of Parliament (MP), using the first-past-the-post voting system.
The constituency covered the counties of Berwickshire and East Lothian.
Members of Parliament
{| class="wikitable"
|-
!colspan="2" | Election !! Member !! Party
|-
|style="color:inherit;background-color: " |
|1918
|rowspan=3|John Hope
| Coalition Liberal
|-
|style="color:inherit;background-color: " |
| Jan 1922
| National Liberal
|-
|style="color:inherit;background-color: " |
| Oct 1922
| Independent Liberal
|-
|style="color:inherit;background-color: " |
|Nov 1922
|rowspan=2|Walter Waring
| National Liberal
|-
|style="color:inherit;background-color: " |
| Nov 1923
| Liberal
|-
|style="color:inherit;background-color: " |
|Dec 1923
|Robert Spence
| Labour
|-
|style="color:inherit;background-color: " |
|1924
|Chichester Crookshank
| Unionist
|-
|style="color:inherit;background-color: " |
|1929
|George Sinkinson
| Labour
|-
|style="color:inherit;background-color: " |
|1931
|John McEwen
| Unionist
|-
|style="color:inherit;background-color: " |
|1945
|John Robertson
| Labour
|-
|
| 1950
|colspan="2"| constituency abolished
|}
Election results
center|thumb|747x747px|Berwickshire constituencies electoral history
Elections in the 1910s
thumb|120px|Tennant
Elections in the 1920s
thumb|120px|Walter Waring
thumb|120px|J.D. Hope
thumb|120px|Sir James Greig
Elections in the 1930s
General Election 1939–40
Another General Election was required to take place before the end of 1940. The political parties had been making preparations for an election to take place and by the Autumn of 1939, the following candidates had been selected;
- Unionist: John McEwen
- Labour: John Robertson
- Liberal: