Major General Erik Lennart Rönnberg (21 November 1938 – 25 December 2022) was a Swedish Army officer.

[3] Rönnberg attended the Swedish Armed Forces Staff College in 1971[2] and he was promoted to major on 1 October 1972.

[5] Rönnberg attended the British Army Staff College in 1976[2] and was promoted to lieutenant colonel on 1 October 1977.

Rönnberg attended the Swedish National Defence College in 1981[2] and served as battalion commander in Västernorrland Regiment from 1981 to 1983.

[2][3] Rönnberg then served as head of the Swedish Delegation to the Neutral Nations Supervisory Commission (NNSC) from 1 January 1997 to February 1998.