Stefan Frankowski (3 April 1887, in Volhynia – 25 September 1940, in Bielawa) was a Polish Captain, posthumously promoted to Rear Admiral.

An officer of surface naval ships, from 1908 to 1917 he served in the Russian Imperial Navy and participated in the First World War.

During his service in the Imperial Russian Navy he sailed as a navigation officer on surface ships: the battleships "Cesarewicz" and "Slava" and the cruiser "Aurora".

In 1919 he volunteered for the Polish Army and took up the position of head of the Operations Department in the Navy Section of the Ministry of Military Affairs in Warsaw.

[1] After returning to Poland, he became the commendant of the course for officers of the Riverine-Coast Corps, and then head of the Personnel-Training Section in the Department for Maritime Affairs.

On November 17, 1925, the Minister of Military Affairs awarded him the academic title of General Staff officer.

During the defense of the Coast during the Invasion of Poland, he commanded the entire army gathered on the Hel Peninsula and the mine ships in the Gdańsk Bay.

After the campaign he was held in German captivity in the oflags: X B Nimburg, XVII C Spittal, II C Woldenberg and VIII B Silberberg.