Colonel Sir John McMahon, 1st Baronet was a British Army officer and politician who served as the Private Secretary to the Prince Regent from 1811 to 1817.
- Occupation
- politician
- Position held
- member of the 4th Parliament of the United Kingdom, Member of the Privy Council of the United Kingdom, member of the 2nd Parliament of the United Kingdom, member of the 3rd Parliament of the United Kingdom
- Citizenship
- United Kingdom of Great Britain and Ireland, Kingdom of Great Britain
- Born
- 1754
- Died