Louis Joseph Kirn (June 8, 1908 – November 17, 1995), nicknamed "Bullet Lou Kirn", was an American Navy officer.

Kirn was born on June 8, 1908, in Milwaukee, Wisconsin.

He attended the United States Naval Academy, playing halfback for the Army Black Knights, playing against the Notre Dame Fighting Irish, and graduated in 1932.

[3] During World War II, he fought in the Guadalcanal and Solomon Islands campaigns.

[3] From January to December 1966, he served as the Vice Director of the Joint Staff.