Folke Olof Ragnar Herolf (11 November 1912 – 20 August 1982) was a Swedish Army officer.

Herolf was born on 11 November 1912 in Hässjö Parish, Timrå Municipality, Sweden,[1] the son of Olof Nilsson, a chief engineer, and his wife Alfhild (née Fliesberg).

Herolf served as section chief in the Royal Swedish Army Supply Administration from 1948 to 1954 when he was promoted to major.

Herolf was head of the Operating Section (Driftsektionen) in the Förplägnadsbyrån ("Catering Bureau") in the Royal Swedish Army Supply Administration from 1957 to 1958,[4][5] promoted to lieutenant colonel in 1958[3] and was head of the Military Section in the Centralbyrån ("Central Bureau") in the Royal Swedish Army Supply Administration from 1958 to 1963.

In 1968, Herolf was promoted to senior colonel and served as commanding officer of the Quartermaster Corps of the Swedish Armed Forces from 1968 to 1973.