Major General Knut Lennart Peyron (19 November 1909 – 30 December 1981) was a Swedish Air Force officer.

Peyron served as chief of staff of the Third Air Group (Tredje flygeskadern, E 3) from 1944 to 1947 when he was promoted to lieutenant colonel.

In 1952, Peyron was appointed Inspector of Flight Safety (Flygsäkerhetstjänsten) and in 1957 Chief of the Air Staff.

He served in this position for three years until he was appointed commanding officer of the Third Air Group in 1960.

[1] Peyron died on 30 December 1981 and was buried at Norra begravningsplatsen in Stockholm on 8 April 1982.