Captain Nils Harry Martin Bong (13 June 1905 – 18 July 1987) was a Swedish Navy officer.

[1] Bong was commissioned as a naval officer in the Swedish Navy in 1926 with the rank of acting sub-lieutenant.

[3] He graduated from the Royal Swedish Naval Staff College in 1933 and was promoted to Lieutenant (Kapten) in 1938.

[3] He was promoted to lieutenant commander in 1944 and served as captain of the coastal defence ship HSwMS Oscar II from 1944 to 1945.

In 1954, he served as captain of the cruiser HSwMS Tre Kronor and as commanding officer of the 1st Squadron of the Coastal Fleet from 1954 to 1955.