Berndt Robert Gustaf Stackelberg (12 January 1784 in Turku County, Finland – 10 November 1845 in Stockholm, Sweden) was a Swedish military officer and diplomat.
Stackelberg was governor of the Swedish colony of St. Barthélemy in the West Indies 1812–1816, and chargé d'affaires of Sweden's diplomatic mission to the United States, 1819–1831.
Stackelberg distinguished himself in the Battle of Sävar in 1809 where he was wounded in action, and was brevetted major and appointed assistant adjutant general.
Later that year he became a knight of the Order of the Sword and commissioned major in the Scanian Carabineer Regiment.
[1] [2] [3] Stackelberg served as governor of the Swedish colony of St. Barthélemy in the West Indies from 14 February 1812 to 20 October 1816.