Clint Calvin Hearn (March 29, 1866 – February 11, 1928) was a United States Army officer in the late 19th and early 20th centuries.

[4] Circa 1904 he was co-developer of the Whistler-Hearn plotting board and authored a manual on fire control.

[5] Hearn was promoted to the rank of brigadier general on August 5, 1917, and he commanded the 153rd Field Artillery Brigade in the 78th Infantry Division.

[6] After the war's end, starting on April 10, 1922,[4] Hearn served as the Chief of Staff of the Non-Divisional Group of the Reserve Units in Harrisburg, Pennsylvania.

[1] Hearn died in Atlanta, Georgia on February 11, 1928,[1][4] and he is buried at Arlington National Cemetery.