When Louis Addison Dent was born on 6 October 1863, in Baltimore, Maryland, United States, his father, Addison Isaac Dent, was 38 and his mother, Mary J. Suman, was 33. He married Catherine Estelle "Kate" Yost on 3 June 1884, in District of Columbia, United States. They were the parents of at least 3 sons and 2 daughters. He lived in Washington, District of Columbia, United States for about 50 years and District of Columbia, United States in 1940. He registered for military service in 1887. He died on 11 March 1947, at the age of 83, and was buried in Glenwood Cemetery, Edgewood, Washington, District of Columbia, United States.