Sir John Sinclair-Wemyss Arbuthnot, 1st Baronet, was a British Conservative Party politician.
- Occupation
- politician
- Position held
- member of the 42nd Parliament of the United Kingdom, member of the 41st Parliament of the United Kingdom, member of the 40th Parliament of the United Kingdom, member of the 39th Parliament of the United Kingdom
- Citizenship
- United Kingdom
- Born
- February 11, 1912
- Died
- June 13, 1992