Jack Lee McCool, the son of Larry Steven and Juanita Jane (Theulen) McCool, was born on December 3, 1952, in Harlan, Iowa. He attended school in Tennant, Iowa, through the third grade. When the Tennant school consolidated with the Shelby, Iowa, school, becoming Shelby-Tennant Community School, Jack continued his education in Shelby; he graduated with the Class of 1971.After graduation, Jack entered the United States Army.