When Robert Grace Callison was born on 21 November 1894, in Bowser, San Saba, Texas, United States, his father, Thomas Miles Callison, was 35 and his mother, Frances Emmaline Anderson, was 33. He married Vera Frances Carpenter on 18 June 1926. They were the parents of at least 3 sons. He lived in Brownwood, Brown, Texas, United States in 1910 and Supervisorial District 1, Cochise, Arizona, United States in 1940. He registered for military service in 1917. He died on 30 January 1973, in Broome, New York, United States, at the age of 78, and was buried in Athens, Bradford, Pennsylvania, United States.