| Joachim Hartvig Johan von Barner | |
| Birth Date: | 25 March 1699 |
| Birth Place: | Mecklenburg, Holy Roman Empire |
| Death Place: | Denmark |
| Citizenship: | Denmark-Norway |
| Nationality: | German |
| Profession: | Politician |
| Office: | Governor of Christianssand stiftamt |
| Term Start: | 1745 |
| Term End: | 1751 |
Joachim Hartvig Johan von Barner (1699–1768) was a Danish-German military officer and government official. He served as the County Governor of several counties in Norway and Denmark.[1]
Barner was born in Mecklenburg which was part of the Holy Roman Empire, but moved to Denmark in his youth. He started out as a military officer, serving in the Danish military until 1746. In 1746, he was appointed as the Diocesan Governor of Christianssand stiftamt (and simultaneously serving as the County Governor of Nedenæs amt). He was then transferred to Denmark where he served as the County Governor of Kalundborg, Dragsholm, Sæbygaard and Holbaek counties. He held that post until he died in 1768.[2]