Gustaf Jacob Horn af Rantzien (1706–1756) was a Swedish baron. He was executed for treason as one of the conspirators participating in the failed coup d'etat of queen Louisa Ulrika, the Coup of 1756.
- Occupation
- politician
- Position held
- Hofmarschall, chamberlain, member of the Riksdag of the Estates
- Citizenship
- Sweden
- Born
- May 5, 1706
- Died
- July 23, 1756
