When Deward Luther Foust was born on 17 November 1898, in Marion Township, Allen, Ohio, United States, his father, Enos Foust, was 38 and his mother, Ilena Sillin, was 30. He married Margaret E Kerschner in 1920. They were the parents of at least 3 sons. He lived in Delphos, Marion Township, Allen, Ohio, United States in 1900 and Lima, Allen, Ohio, United States for about 10 years. He died on 27 September 1983, in Allen, Ohio, United States, at the age of 84, and was buried in Delphos, Allen, Ohio, United States.