Charles W. Cook was born around 1842 in Pennsylvania. By the early 1860s, he was living in Pittsburgh, Pennsylvania. He enlisted in the Union army on May 1, 1861, and he mustered in as a private in Company C of the 38th Pennsylvania Infantry. The regiment took part in the Seven Days’ Battles, the Second Battle of Manassas, the Battle of Antietam, and the Battle of Fredericksburg. He was discharged for disability on January 19, 1863.
He returned to the Union army in July 1864, mustering in as a corporal in Company A of the 193rd Pennsylvania Infantry. He was promoted to sergeant on September 6, 1864, and he mustered out on November 9, 1864.
He moved to Wheeling, West Virginia, after the war, and he earned a living as an iron worker. He married a woman named Mary, and they had at least five children: Elizabeth, born around 1871; Charles, born around 1874; George, born around 1875; Chester, born around 1878; and Stella, born around 1880. He applied for a federal pension in April 1880 and eventually secured one. He died on December 6, 1892.