When Roy Loper was born on 8 December 1890, in Idaho, United States, his father, James T Loper, was 20 and his mother, Sarah Ann Green, was 17. He had at least 4 sons and 2 daughters with Martha Caroline Thompson. He lived in Vale, Malheur, Oregon, United States in 1910 and White Bird, Idaho, Idaho, United States in 1920. He died on 21 October 1955, in Klamath Falls, Klamath, Oregon, United States, at the age of 64, and was buried in Klamath Falls, Klamath, Oregon, United States.