When Charles Oscar Stevens was born on 6 January 1860, in Glendale, Monroe, Wisconsin, United States, his father, Albert Stevens, was 43 and his mother, Elizabeth Parsons, was 32. He married Ottelia Emma Caroline Scherck on 21 February 1884, in Kiowa, Thayer, Nebraska, United States. They were the parents of at least 4 sons and 7 daughters. He lived in Election District 11, Sheridan, Wyoming, United States in 1900 and Election District 4 Whiskey Gap-Lamont-P. and R. Marvin and Seminole Dam, Carbon, Wyoming, United States in 1940. He died on 6 October 1943, in Rawlins, Carbon, Wyoming, United States, at the age of 83, and was buried in Rawlins, Carbon, Wyoming, United States.