Henry Unwin Addington was a British diplomat and civil servant.
- Occupation
- diplomat
- Position held
- Member of the Privy Council of the United Kingdom, Ambassador of the United Kingdom of Great Britain and Ireland to Spain, ambassador of the United Kingdom to the German Confederation, Permanent Under-Secretary of State for Foreign Affairs
- Citizenship
- United Kingdom of Great Britain and Ireland, Kingdom of Great Britain
- Born
- March 24, 1790
- Died
- March 6, 1870
