When Charles Anthony Geist was born on 5 July 1878, in Chapman, Dickinson, Kansas, United States, his father, William J. Geist, was 33 and his mother, Margaret Ann Shoffner, was 30. He married Ethel B. Smith on 4 September 1907. They were the parents of at least 1 daughter. He lived in Fremont, Colorado, United States in 1935 and Colorado Springs, El Paso, Colorado, United States in 1940. He died on 26 December 1945, at the age of 67.