Frank Ross McCoy (October 29, 1874–June 4, 1954) was an American soldier, born in Lewistown, Pennsylvania. He graduated from the United States Military Academy in 1897, was commissioned a 2nd Lieutenant and appointed to the 8th Cavalry. He served on the western front in Cuba, in the Philippines, and in the Santiago campaign. In Cuba and in the Philippines, he acted as aide to General Wood and was for several years aide to President Roosevelt after his promotion to Major General.

In 1911, he was appointed a member of the General Staff, and in 1917, became a member of the General Staff of the American Expeditionary Force in Europe, where he commanded the 165th Infantry Regiment in 1918. While serving in France, he wrote: Principles of Military Training (1918). From 1918 to 1919, he was Director of Transportation in the American Expeditionary Force. In 1919, he served as chief of staff in the American military mission to Armenia. From 1926 to 1929, he commanded the 3rd Infantry Brigade and the 1st Field Artillery Brigade. From 1932 to 1933, he served on the Lytton Commission investigating the Japanese military invasion and occupation of Manchuria. He retired from the army in 1938, but recalled between 1941 and 1942 to serve on the Roberts Commission.

McCoy's official services over the years were widely recognized and rewarded, both at home and abroad. The decorations received by him from grateful governments included: from the United States, the Distinguished Service Medal with Oak Leaf Cluster, the Silver Star with Oak Leaf Cluster, and the Purple Heart; from Belgium, the Order of the Crown (Commander); from Great Britain, the Order of St. Michael and St. George (Companion); from France, the Legion of Honor (Officer) and the Croix de Guerre (with three Palms); from Montenegro, the Order of Prince Danilo I; from China, the Order of Chia Ho; from Japan, the Order of the Rising Sun; and from Nicaragua, the Medal of Merit.

After the war, he became the chairman of the Far Eastern Commission, an international body created to determine the fate of postwar Japan.

His birthplace, the McCoy House, was added to the National Register of Historic Places in 1973