Eli Cook was married to Sarah Cook (maiden name unknown), and had multiple children, daughters Adeline, Angeline and Emeline
and a son, Franklin. His family lived in Springfield, Illinois and he travelled west from St. Joseph, Missouri in 1849 without
them. He travelled to Sacramento, California before settling in Nevada City and operating a dry goods business. He lived in
Nevada City until at least December of1852. While living in Illinois he was a member of the Odd Fellows Lodge.